### Home > CCA2 > Chapter 2 > Lesson 2.2.4 > Problem 2-146

2-146.

A parabola has vertex

If this parabola is a function, find its equation.

Recall the standard form for the equation of a parabola:

Substitute the appropriate values for the vertex, and *x*and*y*(0, 0), then solve for*a*.Refer to problem 2-127 in Lesson 2.2.3 if you need more help.

Suppose this parabola is not a function, but is a “sleeping” parabola. Find its equation.

Use the equation

where the vertex is at (*h*,*k*).Use the eTool below to graph the equations.

Click the link at right for the full version of the eTool: CCA2 2-146 HW eTool