In the graph below, the straight line S is given by the equation y = c + dx. As the line shifted, the constant "d" which is the slope, must have changed. It is difficult to tell if the constant "c," the y-intercept, also changed unless you extend the lines to meet the y-axis.

If you got this practice correct, move on to the next unit. If you missed this one, read through the detailed solutions and review this unit.

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