1. Using the graph below, answer the following questions.

At what coordinates does the line AC intersect the y-axis? AC intersects the y-axis at (0, 400). (Don't forget when you are asked for coordinates to give both the x and the y coordinates). At a y value of 200, what is the x value for line AC? When y has a value of 200, the value of x on line AC is 200. What are the coordinates of the intersection of lines AC and RS? The coordinates of the intersection of lines AC and RS are (300, 100).

1. How is the point of intersection affected by this shift (how do the coordinates of the intersection change)?
   When line S shifts from S1 to S2:
   • the x-coordinates decreases, and
   • the y-coordinate increases.
   

   If you answered all of these correctly, you should move on to the next unit. If you missed any of these, read through the detailed solutions and review this unit.

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