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Find the equation to the line below.
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y=ax+b

->a= positive (the line is going up)

->to find a, we move one unit horizontally and look over how many units you meet the graph (1 to right, 4 up) so the a= 4

-> to find b, we look for the y-coordinate of the point where the graph and the y-axis cross. they cross in (0,1) so b is 1

when we take this all together we get y=4x+1
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