Answer to Initial Practice
Unit 2: Identifying the Intersection of Lines

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

  1. At what coordinates does the line GJ intersect the y-axis?
    GJ intersects the y-axis at (0, 70). (Don't forget when you are asked for coordinates to give both the x and the y coordinates).
  2. What are the coordinates of the intersection of lines GJ and HK?
    The coordinates of the intersection of lines GJ and HK are (15, 40).
  3. At a y value of 60, what is the x value for line GJ?
    When y has a value of 60, the value of x on line GJ is 5.
  4. At point K, what is the y-coordinate?
    At point K, the y-coordinate is about 80. You may have answered 81 or 82.

  1. How is the point of intersection affected by this shift (how do the coordinates of the intersection change)?

    When line P shifts from P1 to P2, the x-coordinates increases 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.

         
[review unit] [detailed solution] [additional practice] [table of contents] [next unit]