Question

Can someone help me with this problem please :)

Answer 1

Answer:

y = $\frac{15}{2}$

Step-by-step explanation:

Given y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 10 when x = 20

k = $\frac{y}{x}$ = $\frac{10}{20}$ = $\frac{1}{2}$

y = $\frac{1}{2}$ x ← equation of variation

When x = 15, then

y = $\frac{1}{2}$ × 15 = $\frac{15}{2}$