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Plot A versus B for A=5(B-20)/8 for B values from -20 to +80 line & system solution

Algebra b graphs:line & system solution (a)

 

Y=x-3 With Y=-x+5

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Parviz F. | Mathematics professor at Community CollegesMathematics professor at Community Colle...
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   A = 5/8 B - 5/2           This is just graph of a line with slope 5/8, and B = -5/2., as Horizontal (B) intercept.
 
        Mark points 
     
            ( -20, -15)     ( 80, 95/2) on the graph. and have the plot between those 2 points.