Answer:
m = 5p
Step-by-step explanation:
Given that m varies directly as p then the equation relating them is
m = kp ← k is the constant of variation
To find k use the condition m = 20 when p = 4
k = [tex]\frac{m}{p}[/tex] = [tex]\frac{20}{4}[/tex] = 5
m = 5p ← equation of variation