SOLUTION: how do you find the rate of change with two given points and then tell the classification of the line?

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Question 59901: how do you find the rate of change with two given points and then tell the classification of the line?

Answer by tutorcecilia(2144) About Me  (Show Source):
You can put this solution on YOUR website!
The rate of change is the slope or the "slant" of the line.
(y1-y2)/x1-x2) [The slope formula]
Given points (1,2) and (3,4)
Slope=m=(2-4)/(1-3) [Plug-in the values for y1, y2, x1, and x2; and solve]
Slope=m=(2-4)/(1-3) =-2/-2=1
.
The sign (positive or negative) of the slope determines whether it is a postive or negative slope:
Example: m = -2 is a negative slope
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+2x-2+%29+
.
Example: m=+2 is a positive slope
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+-2x-2%29+