Question

How do I use y=mx to solve this?​

Answer 1

Answer:

see explanation

Step-by-step explanation:

let m be mars and e be earth.

Given that m varies directly with e then the equation relating them is

m = ke ← k is the constant of variation

To find k use the condition m = 50, e = 150, then

k = $\frac{m}{e}$ = $\frac{50}{150}$ = $\frac{1}{3}$

m = $\frac{1}{3}$ e ← equation of variation

When e = 120, then

m = $\frac{1}{3}$ × 120 = 40 pounds