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Question 176819: I am having a struggle in determining the slope on a graph and therefore, cannot graph parallel lines.
Can you offer some helpful hints?
Thank you,
kelloggdmk
Answer by josmiceli(19441)   (Show Source):
You can put this solution on YOUR website! The slope on a graph has exactly the same definition as
the slope of a roof. It is rise over run. For the slope of
a roof, you measure how high the roof is and divide by
the distance from the peak to the eaves, or the gutter
On a graph, the formula for this is
where the given points are (x1,y1) and (x2,y2)
If the equation of the line is in this form:
 , then  = slope
For instance,
The slope is 
Any line parallel to this one will also
have a slope =
And to measure this slope, you would start at some point on
the line, say (0,17) which is the y-intercept, go up
2 units and see how far you went horizontally. It
should be 3 units. That's the rise over run as in a
roof.
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