# parabola open upward or downward

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Solve the 2 problems. Show your work.

1. y = x ^2 - 4x -12

a) What is the vertex?

b) What are the intercepts?

c) Does the parabola open upward or downward?

2. y = -x^2 + 2x +3

a) What is the vertex?

b) What are the intercepts?

c) Does the parabola open upward or downward?

https://brainmass.com/math/algebra/parabola-open-upward-downward-262421

#### Solution Preview

Solve the 2 problems. Show your work.

1. y = x ^2 - 4x -12

a) What is the vertex?

Vertex will be at x = -b/2a = -(-4)/2 = 2

y = 2^2 - 4*2 - 12 = 4 - 8 - 12 = -16

vertex = (2, -16)

b) What are the intercepts?

X -intercept

Put y = 0

x ^2 ...

#### Solution Summary

The parabola as open upward or downward is discussed.

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