The function f (x) varies directly with x, and f (x) = 45 when x=9 evaluate f (x) when x=3

a) 5

b) 9

c) 15

d) 27

Question

Maci Mercado

20 May, 05:23

+5

Answers (2)

Know the Answer?

Elena Marks · Answer 1

F (x) is the same as y

9/45 = 3 / y

cross multiply

(9) (y) = (45) (3)

9y = 135

y = 135/9

y = 15 <==

Arturo · Answer 2

The answer is -

c) 15

The function f (x) varies directly with x, and f (x) = 45 when x=9 evaluate f (x) when x=3a) 5b) 9c) 15d) 27