Question 247793: problem rate of change and slope algebra 1 chapter 4 glencoe algebra problem i need to be solve here goes find the slope of the line that passes through each pair of points (4,9),(1,6) (-4,-1),(-2,-5) (1,-2), (6,2) (4,3.5),(-4,3.5)
Found 2 solutions by solver91311, richwmiller:
Answer by solver91311(24713)   (Show Source):
Answer by richwmiller(17219)  (Show Source):
You can put this solution on YOUR website! slope m is m=(y1-y2)/(x1-x2)
where y1 is the first y and y2 = the second y
where x1 is the first x and x2 = the second x
(4,9),(1,6)
(-4,-1),(-2,-5)
(1,-2), (6,2)
(4,3.5),(-4,3.5)
be sure to pay attention to the signs and make sure you are plugging in y's and x's
minus a minus is plus
x is before the comma and y is after the comma
so for the first set of points
remember y's on top
(9-6)/(4-1)
second
[-1-(-5)]/[-4-(-2)]
third
[-2-2]/(6-1)
fourth
[3.5-3.5]/[4-(-4)]
what does a zero in the numerator mean? no slope =horizontal line
what does it mean when there is a zero in the denominator? undefined slope= vertical line
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