Home > CCA2 > Chapter 9 > Lesson 9.1.2 > Problem9-29

9-29.

Find the exact equation of the graph below. 9-29 HW eTool (Desmos).

Write the equation by using the $x$-intercepts. Don't forget you have a double root at $x = -2$. Add your constant of proportionality.

Find the constant of proportionality by substituting the $y$-intercept $(0, 2)$ for $x$ and $y$.

$y=k(x+2)(x+2)(x-2)$

$y =-\frac{1}{4}(x-2)(x+2)^2$