Question

Identify the variation as direct, inverse, joint or combined. A = r²

Answer 1

The answer is: Direct variation.

The explanation for this problem is shown below:

1. In direct variation, when a quantity
`x` varies directly as another quantity
`y`, the value of the quantity
`x` increases when
`y` increases, and decreases when
`y` decreases.

2. Based on this information, let's see the expression given in the problem:

`A=r^(2)`

3. As you can see, if you give values to
`r^(2)`, the value of
`A` will have a direct variation. When
`r^(2)` increases,
`A` increases, and when it decreases
`A` decreases.

Answer 2

Answer : Direct Variation

Question :

Identify the variation as direct, inverse, joint or combined. A =
`\pi r^2`

We know direct variation is y = kx

Where k is the constant of proportionality

When value of x increases then y also increases. when x value decreases then y value decreases.

The value of y depends on value of x It means y is directly proportional to x.

Hence A =
`\pi r^2` is a direct variation.