Danny had $116 to spend on nine books. After buying them he had $72 left. How much did each book cost?
1 answer:
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9514 1404 393
Answer:
-2/3
Step-by-step explanation:
The slope formula is useful for this.
m = (y2 -y1)/(x2 -x1)
m = (2 -(-6))/(-9 -3) = 8/-12
m = -2/3
The slope of the line is -2/3.
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The graph shows the two points and a line with a slope of -2/3.
