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Writing Linear Functions

Writing Linear Functions 1.8 - Solution

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In this exercise, we will examine Ron-Jon's incorrect solution when he tried to find the slope of a line. Let's begin by writing the slope formula. In the formula, represents the slope, and and represent points that lie on the line. Let's find the slope by ourselves and compare our results to determine the mistake Ron-Jon made. To do so, we will substitute and for and respectively.
Right away we can see Ron-Jon's error. The points were wrongly substituted into the formula. Basically, he calculated run over rise rather than rise over run. Let's continue and find the correct slope.
The correct slope is