Question

If y varies directly with x, find the constant variation with x= 4 and y= -26

Answer 1

The constant variation is k=-13/2

Answer 2

k = - 6.5

Explanation:

Given that y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition x = 4 when y = - 26, hence

k =
`(y)/(x)` =
`(-26)/(4)` = -
`(13)/(2)` = - 6.5