Question 1014830
Find the slope. (7,0) (0,-8).  I already did the problem as -8-0 over 0-7= -8/-7 it told me my answer was wrong on webassign. 
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Slope is the change in y divided by the change in x.
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= (-8-0)/(0-7)
= -8/-7
= 8/7
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Your answer is correct, but might be rejected because of the 2 minus signs.