Question

The value of y varies directly with x, and y = -3 when x = 11.



Find y when x = 66.

Answer 1

`The value of y varies directly with x` means y = k*x where k is some fixed number (a constant)

Answer 2

we're told that ` y = -3 when x = 11` so we can use this to find k

y = k*x

-3 = k*11 ... plug in x = 11 and y = -3

solve for k