Answer:
y = 49
Step-by-step explanation:
y ∝ x²
=> y = kx²
Where k is the constant of proportionality
k = 1 (We've found this out in the previous question)
Now,
y = ? when x = 7
The above equation becomes:
=> y = (1)(7)²
=> y = (1)(49)
=> y = 49
