x -2,-1,0,1,2, and y -5,-2,1,4,7

a. Write out an equation for f(x). Assume the function is linear

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  1. If it is linear then the general equation for a straight line
    must apply

    Take two sets of coordinates and plug these in


    solve for m and c


    check using another set of points

    7=2x3+1 which is fine

    so equation is


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