if "f" varies directly with "m" and f=-19 when m=14, what is "f" when m=2

Answer 1

Hi, Janii.

If f varies directly with m, then:

f = km

If f = -19 when m = 14, then:

-19 = 14k

k = -19/14

Now, you can substitute k into the original equation:

f = (-19/14)k

So, to find what f is when m = 2, :

f = (-19/14)(2)

f = -19/7