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When A student found the slope of a line that passes through -3 10 and 5 -7 to be 3 over 8 what mistake did he make?
Wiki User
∙ 6y ago
He has to
1) subtract MINUS 7 for y'
2) Use MINUS 3 and MINUS 5 for x and x'
He incorrectly wrote this
(y - y') / (x - x')
like this:
(10 - 7) / 3 + 5)
He should have written this:
(10 - (-7)) / (-3 -5)
This comes out to
(10 + 7) / (- 3 -5)
17 / - 8
Correct answer:
Slope = 17 / - 8
Wiki User
∙ 6y ago
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