Question

Suppose y varies directly with x, and y = 8 when x = –6. What direct variation equation relates x and y? What is the value of y when x = –2?

Answer 1

y1/x1=y2/x2

8/-6=y/-2
8(-2)=-6(y)
-16=-6y
y=8/3


or

y=kx
8=k (-6)
k==-4/3

y=kx
y=-4/3 ( -2)
y=8/3