Answer:
y = 165
Explanation:
given y varies directly as x then tehe equation relating them is
y = kx ← k is the constant of variation
to find k substitute x = 3 when y = 15 into the equation
15 = 3k ( duvide both sides by 3 )
5 = k
y = 5x ← equation of variation
when x = 33 , then
y = 5x = 5 × 33 = 165