Question

Which equation is the direct variation equation if f(x) varies directly with x and f(x) =-12 when x=6

Answer 1

f(x) = -2x

Explanation:

Direct variation equation is y= kx, or f(x)=kx

f(x)= -12, x=6

f(x)=kx

-12 = k*6

k= - 2

f(x) = -2x