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Finding the Slope of a Linear Function

Avg difficulty 2.5

If $f \left(x\right)$ is a linear function, and $\left(3,−2\right)$ and $\left(8,1\right)$ are points on the line, find the slope. Is this function increasing or decreasing?

OpenStax Precalculus 2e, 2.1 Linear Functions, exercise 3

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Adapted from College Algebra © 2021 Rice University. Licensed under CC BY 4.0. Sources: College Algebra 2e, Algebra and Trigonometry 2e, Precalculus 2e, College Algebra with Corequisite Support 2e. Imported at revision 4922e46.