Question

If f(x) varies directly with x, and f(x) = 12 when x = 8, write the direct linear variation equation.

Answer 1

hint: If f(x) varies directly with x, then \[\Large f(x) = kx\]

where k is some constant

Answer 2

1.5?

Answer 3

k = 1.5 is correct

Answer 4

so \[\Large f(x) = 1.5x\] is your function.

Answer 5

if you were to plug in x = 8, you would get f(x) = 12