Question

If y varies directly with x, Write an equation relating x and y when y = -30 and x = 6.
A) 6x = -30y
B) y = 5x
C) y = -5x
D) -6x = -30y

Answer 1

C. You can write a simple equation for a "directly varying" curve as y=kx. Then plug in your given values of x and y to find k

Answer 2

Thank you so much for explaining it to me.