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

–150
–75
–30
–5

Answer 2

jjuden, as before, I'd appreciate your starting out by stating what you already know about this problem and what you've already done. Where have you encountered "varies directly as" before?