Answer:
Divide the known y and x:
15/5 = 3
Y is 3 times as much as x.
Now multiply X by 3 to find y:
Y = 19 * 3 = 57
Answer:
y = 57
Step-by-step explanation:
Given that y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 15 when x = 5
k = [tex]\frac{y}{x}[/tex] = [tex]\frac{15}{5}[/tex] = 3, hence
y = 3x ← equation of variation
When x = 19 then
y = 3 × 19 = 57
