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7-4 Slope. By: Crystal Wai. What is a slope?. Example 1. From textbook page 321 number 3 (part A). m= -2-7 5-(-2) add and subtract m= -9 7. rise -9. Answer: -9/7. run 7. Example 2. From textbook page 322 number 29( part B).
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7-4 Slope By: Crystal Wai
Example 1 From textbook page 321 number 3 (part A)
m= -2-7 5-(-2) add and subtract m= -9 7 rise -9 Answer: -9/7 run 7
Example 2 From textbook page 322 number 29( part B)
29. A line contains (4,3) and (x,7). It has slope 2. Find x. Use the slope formula. 2 = 7-3 x-4 2 = 4 (x-4) subtract 4 = 4 (x-4) make the fraction same 2=x-4 solve the x out x=6 Answer: x=6
Sometimes there will be some problems like Horizontal and Vertical Lines. Horizontal Line -any two points that have the same y-coordinate, the slope is 0.
Vertical Line -any two points that have the same x-coordinate, that the slope have no slope.