### Home > INT3 > Chapter 2 > Lesson 2.2.4 > Problem 2-103

2-103.

A parabola has vertex

If this parabola is a function, what is its equation?

Recall the standard form for the equation of a parabola:

Substitute the appropriate values for the vertex, and and, then solve for.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. Now, what is its equation?

Use the equation

where the vertex is at.

Use the eTool below to graph the equations.

Click the link at right for the full version of the eTool: INT3 2-103 HW eTool