Question

The points (-7,-10) and (5,j) fall on a line with a slope of 13. What is the value of j? 

          The points (-7,-10) and (5,j) fall on a line with a slope of 13. What is the value of j?

Added by Ryan P.

Calculus: Early Transcendentals
Calculus: Early Transcendentals
James Stewart 8th Edition
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The points (-7,-10) and (5,j) fall on a line with a slope of 13. What is the value of j?
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Transcript

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00:01 Hi, in this question, given that the line passes through the points 5, 19 and – 5, – 1, we need to use the first point in our equation.
00:15 So, first we need to find the slope.
00:18 We know that slope m can be found by using the formula y2 -y1 divided by x2 -x1.
00:25 On substituting the corresponding coordinates y2 as – 1, y1 as – 19 divided by x2 as – 5, – x1 as 5 which is equal to – 20 divided by – 10.
00:41 On further simplification which is equal to 2.
00:45 Therefore, slope m equals 2...
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