# what is jointly proportional

What Is Jointly Proportional? When we say z is jointly proportional to a set of variables, it means that z is directly proportional to each variable taken one at a time. If z varies jointly with respect to x and y, the equation will be of the form z = kxy (where k is a constant). Equation: c = 5ab.

What is the meaning of jointly in math? Joint variation describes a situation where one variable depends on two (or more) other variables, and varies directly as each of them when the others are held constant. We say z varies jointly as x and y if. z=kxy. for some constant k.

What is the example of joint variation? When a variable is dependent on the product or quotient of two or more variables, this is called joint variation. For example, the cost of busing students for each school trip varies with the number of students attending and the distance from the school.

What is combined proportion? Combined proportionality (or combined variation) is just the combination of direct and inverse proportionality. If a variable has a combined proportionality with two other variables, then it has a direct proportion with one and an inverse proportion with the other.

## What is directly proportional?

When two quantities are directly proportional it means that if one quantity goes up by a certain percentage, the other quantity goes up by the same percentage as well.

## What does inversely proportional mean?

adjective. Britannica Dictionary definition of INVERSELY PROPORTIONAL. : related so that as one becomes larger the other becomes smaller.

## What does the statement a varies jointly as B and C describe?

Joint variation – the statement “a varies jointly as b and C” means a=kbc Try or k= a/bc where k is the constant of variations.

## What is a combined variation?

Combined variation describes a situation where a variable depends on two (or more) other variables, and varies directly with some of them and varies inversely with others (when the rest of the variables are held constant).

## What is an example of inverse proportion?

The example of speed and time is a basic and appropriate example of inversely proportional. As the speed increases, the time to complete your trip will decrease. Another inversely proportional example could be the volume and the pressure of an ideal gas. They both are proportional to each other (Boyle’s law).

## How do you solve variations in math?

If we say that y varies directly with x, then y = kx, where k is a constant called the constant of variation. If y varies inversely with x, then y = k/x, where k is the constant of variation. To solve problems involving variation, we use the following steps. Set up the variation equation with k in it.

## What is exponentially proportional?

A proportion in which one number is equal to a constant raised to the power of the other, or the logarithm of the other, is called an exponential proportion. It can be expressed as either: or. for some real number , where. is not zero or one.

## How do you find proportionality?

Students calculate the rate of change also know as the constant of proportionality (k = y/x) which is the constant ratio between two proportional quantities y/x denoted by the symbol k which may be a positive rational number. The x value is directly proportional to the y value such as in the equation y = kx.

## What is the difference between proportional and directly proportional?

Proportion could refer to direct/inverse, so it’s weird. You just need to go with the advice above. “Proportional” is shorthand for “directly proportional”. If the meaning is “inversely proportional”, it’ll say that explicitly.

## What does proportional and inversely proportional mean?

If one variable decreases, the other decreases in the same proportion. Inversely proportional variables are those in which one variable decreases with the increase in another variable and one variable increases with the decrease in another variable. It is opposite to direct proportion.

## What is the difference between proportional and inversely proportional?

Inverse proportion is the relationship between two variables when their product is equal to a constant value. When the value of one variable increases, the other decreases, so their product is unchanged. In contrast, directly proportional variables increase or decrease with each other.

## What is indirectly proportional?

Two quantities are said to be inversely proportional when the value of one quantity increases with respect to a decrease in another or vice-versa. This means that these two quantities behave opposite in nature.

## How many quantities are involved in a joint variation?

Joint variation occurs when one quantity is directly proportional to two or more quantities.

## What are the 4 types of variation?

Examples of types of variation include direct, inverse, joint, and combined variation.

## How can we identify situations that are direct or joint variation?

Joint variation occurs when a variable varies directly or inversely with multiple variables. For instance, if x varies directly with both y and z , we have x=kyz x = k y z . If x varies directly with y and inversely with z , we have x=kyz x = k y z .

## What is the equation of the variation where a varies jointly as B and C and a 36 when B 3 and C 4?

Find the equation of variation where a varies jointly as b and c, and a=36 when b= 3 and c=4 Solution: a =kbc where k is the constant of variation 36=k 34 use the value of a, b and c 36=k12 bc= 34=12 36= 12k 36* 1/12 =12k* 1/12 Apply the Multiplication Property of Equality 36/12 = 12k/12 3=k Therefore, the required …

## What is the constant of variation when a varies jointly as B and C?

A joint variation is a direct variation with two or more variables. A varies jointly as b and c is equivalent to a = kbc, where k is a non-zero constant variation that is also known as the constant of proportionality.

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