Modeling using Variations

Question

Write a function describing the relationship of the given variables.

y varies directly with the square of x and when x=4, y=192

y=

Answer 1

Hi Cameron,

this one is y = kx²

with the substitutions. 192 = 4²k

or 192 = 16k

so dividing, 12 = k

So the particular equation is y = 12x²