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Graphing Lines
Example 10

Example 10: Graphing Linear Functions

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

Problem

If y=3x+8, find y at x=−2\text{If }y=3x+8\text{, find }y\text{ at }x=-2

1. Recognize Pattern

y=mx+by=mx+b

2. Apply Method

y=3x−5,  x=1⇒y=−2y=3x-5,\;x=1\Rightarrow y=-2

3. Conclude

y=2y=2

Final answer

y=2y=2
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