Question

Which is the quadric variation equation for the relationship?

y varies directly with x^2 and y=72 when x=6
a. y=2x^2
b. y=4x^2
c. y=12x
d. y=x^2+25

Answer 1

`y=kx^2\\ 72=k\cdot6^2\\ 72=36k\\ k=2\\ y=2x^2\Rightarrow A`