Question

If f(x) varies directly with x and f(x) = 32 when x = -8, then what is f(x) when x = 4?

Answer 1

f(x) = 32 when x=-8

32 = k*-8

32/-8 =k

k=-4

f(x) = kx

f(x) = -4 * 4

f(x) = -16

choice A