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Example 6 from Precalculus, 2.2 Graphs of Linear Functions
Writing the Equation of a Horizontal Line
Write the equation of the line graphed in Figure 15.
Figure
15
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Solution
For any x-value, the y-value is so the equation is
How did it go?