Question 178034: if they do not at all show the points on the graph just the line how can you find out the slope of the line without using its intercepts
Answer by Mathtut(3670)   (Show Source):
You can put this solution on YOUR website! I assume the line is straight forward and passes thru whole number coordinates
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if so then you simply take the rise over the run
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in other words the change in the y direction over the change in the x direction ....pay attention to direction
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for example if (1,1) is on the line and you have another point on the line at
(3,4) ...you count up 1,2,3 units one the y coordinate(positive-if you move down that is negative)and then you move 2 units to the right(positive again-if you move left that is negative).....so you have +3/+2=3/2 slope. That makes sense because lines with positive slopes rise as you move from left to right and lines with negative slopes fall as you move from left to right.
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hope that answers your question.
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