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Equations of lines in the coordinate plane

1. What is the slope of the line passing through the points (2, 7) and (-1, 3)
A. 2/7
B. 3/4
C. 4/3
D. 1/3
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2 Answers

Hi Anon;
Great question.  You should be proud to ask it!
It is the change of y, divided by the change of x.  It is also called rise (up and down) over run (left and right).
A negative divided by a negative yields a positive number.
The answer is C.
In my classroom, we use the stack and subtract method.
 (2 , 7)
-(-1, 3)
 (3 , 4)
Then take the second number over the first since slope is rise over run.
The Correct answer is C.