### 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). Homework Help ✎

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

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

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

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