### Home > A2C > Chapter Ch4 > Lesson 4.2.2 > Problem 4-91

4-91.

Use the point

Remember that

.Notice that the vertex is

.

The equation for a cubic graph is

.

Notice that the parabola opens downs and is steeper.

4-91.

Use the point

Remember that

.Notice that the vertex is

.

The equation for a cubic graph is

.

Notice that the parabola opens downs and is steeper.