Question 473726
y = -10x 
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The slope is -10.
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x = 0, y = 0 --> (0,0)
x = 1, y = -10 --> (1,-10)
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Using the 2 points,
slope m = diffy/diffx
0, 0
1,-10
------- subtract
-1,10 (diffx, diffy)
m = 10/-1
m = -10