Question

@triciaal
Variable y varies directly with x^2, and y = 196 when x = 7.

Enter the constant of variation in the quadratic variation equation.

y = x^2

Answer 1

Direct variation for quadratics is:

y = kx^2

Plug in what we know:

196 = k(7)^2

196 = 49k

Divide 49 to both sides, what's 196 / 49?

Answer 2

4

Answer 3

Yes, so that is the constant, so we can plug it into our equation:

y = 4x^2

Answer 4

Thank u!

Answer 5

Oh! I am learning Quadratic Variation, too!