Question

If y varies directly as x, and y = -4 when x= 2, find y when x= -6

Answer 1

Answer:Y = 12

Explanation:

Y varies ditectly as x

Y = kx

When y = -4, x = 2

Substitute the value of x and y into Y = kx

-4 = k * 2

Make k the subject of the formula

k = -4/2

k = -2

:. The equation connecting Y and x is

Y = -2x------

When x = -6

Y = -6*-2

Y = 12