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Graphing Lines
Example 9

Example 9: Graphing Linear Functions

Step-by-step worked example for this lesson track.

Problem

If y=4x−8, find y at x=−5\text{If }y=4x-8\text{, find }y\text{ at }x=-5

1. Recognize Pattern

y=mx+by=mx+b

2. Apply Method

y=−2x+9,  x=−1⇒y=11y=-2x+9,\;x=-1\Rightarrow y=11

3. Conclude

y=−28y=-28

Final answer

y=−28y=-28
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