Detailed
Solution to Additional Practice
Unit 2: Identifying the Intersection of Lines
- Using the graph provided, answer the
following questions.
- At what coordinates does the line AC
intersect the y-axis?
In the portion of the graph shown here, we can see that AC
intersect the y-axis at (0, 400).
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- At a y value of 200, what is
the x value for line AC?
In the portion of the graph shown here, we can see that at a
y value of 200, the x value for line AC
is 200.
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- What are the coordinates of the intersection
of lines AC and RS?
Here we can see that the lines AC and RS
intersect at are the coordinates (300, 100).
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- How is the point of intersection affected
by this shift (how do the coordinates of the intersection change)?
The initial point of intersection between lines S and R is
at point D. After line S shifts from S1
to S2, the new point of intersection is
point F. To determine how this shift affects the intersection,
you should look at what happens to the values for the x
and y coordinates.
- That the x-coordinate shifts from 5 to 4. The value
of the x-coordinate
decreases.
- The value of y-coordinate
shifts from 1 to 2. The value of the y-coordinate increases.
If you feel comfortable with this material, move on to the
next unit.
IMPORTANT:
If you still do not understand this practice, you may need more
review than is offered by this book. You may wish to review Book
I of this series before moving on.
