### Home > A2C > Chapter 13 > Lesson 13.2.2 > Problem 13-121

13-121.

Write an equation for the curve shown below. Is it a function? **Justify** your answer.

Use the vertex to write an equation

for a parabola in graphing form.

*y* = *a*(*x* − 3)^{2} + 3

Use the other given point to solve for *a*.