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Algebra 1

7.12.5 Identifying Graphs of Quadratic Equations

Algebra 17.12.5 Identifying Graphs of Quadratic Equations
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Here are graphs that represent three quadratic functions, defined by:

f(x)=x2−4f(x)=x2−4

g(x)=1−x2g(x)=1−x2

h(x)=x2+4h(x)=x2+4

Graph of three parabolas on a coordinate plane. The x-axis extends from negative 5 to 5 with a scale of 1. The y-axis extends from negative 8 to 10 with a scale of 2. The green parabola is labeled function A. The blue parabola is labeled function B. The black parabola is labeled function C.
1.

Which graph represents the equation f(x)=x2−4f(x)=x2−4?

2.

Which graph represents the equation g(x)=1−x2g(x)=1−x2?

3.

Which graph represents the equation h(x)=x2+4h(x)=x2+4?

4.

Which part of the equation tells us that Graph C opens downward?

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