Question

If f =28 when a = 7 find f when a is 10 (direct proportion) ​

Answer 1

F=40
Don’t really know how to explain it tho

Answer 2

f=40

Explanation:

f=28, a=7

`f \infty a \\ f = ka \\28 = k(7) \\ 28 = 7k \\ (28)/(7) = (7k)/(7) \\ 4 = k \\ k = 4 \\ f = 4a \\ a = 10 \\ f = 4(10) \\ f = 40`

Hope that this is helpful.

Have a nice day.