For each function, y varies directly with x. Find each constant variation. Then find the value of y when x = - 0.3.

1. y=2 when x = - 1/2

2. y = 2/3 when x = 0.2

3. y=7 when x = 2

4. y=4 when x = - 3

Question

Mathematics

Mitch

17 March, 21:04

For each function, y varies directly with x. Find each constant variation. Then find the value of y when x = - 0.3.

1. y=2 when x = - 1/2

2. y = 2/3 when x = 0.2

3. y=7 when x = 2

4. y=4 when x = - 3

+2

Answers (1)

Know the Answer?

Marley Kent · Answer 1

You meant "find the constant of proportionality"

Given y=2 when x = - 1/2, and looking for a formula such as y = k*x,

substitute the given value (2) for y and the given value (-1/2) for x:

2 = k * (-1/2). Solve this for k. Then write out the general formula y = k * x, and let x = - 0.3.

For each function, y varies directly with x. Find each constant variation. Then find the value of y when x = - 0.3.1. y=2 when x = - 1/22. y = 2/3 when x = 0.23. y=7 when x = 24. y=4 when x = - 3

For each function, y varies directly with x. Find each constant variation. Then find the value of y when x = - 0.3.

1. y=2 when x = - 1/2

2. y = 2/3 when x = 0.2

3. y=7 when x = 2

4. y=4 when x = - 3