Question

If f(x) varies directly with x and f(x) = 50 when x = –10, then what is f(x) when x = 15?

Answer 1

"f(x) varies directly with x" means f(x)=k*x, where k is a constant.
So use 50=k*(-10) to solve for k; then use that to calculate f(x) when x=15 :)

Answer 2

Thank you!

Answer 3

welcome n thanks for the medal :)