Question

If f(x) varies directly with x, and f(x) = 45 when x = 9, find the value of f(x) when x = 3.
(Points : 1)
5
9
15
27

Answer 1

well if x is 9 and f(x) = 45

Answer 2

you divide to find f

Answer 3

45/9=5

Answer 4

direct variation equations are in the form

f(x) = kx

substitute what you know to find k, the constant of variation

Answer 5

so 5*3=15

Answer 6

the thrid choice or c

Answer 7

there you go, someone always give the answer

Answer 8

i said the steps first :/

Answer 9

thank you