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Chapter 1 Section 1.1
4.
Check Point Exercises
The meaning of a [−100,100, 50] by [−100,100,10] viewing rectangle is as follows: distance between x -axis minimum maximum tick x -value x -value marks
1.
P P P [ −100 , 100 , 50 ] by distance between y -axis minimum maximum tick y -value y -value marks
P P P [ −100 , 100 , 10 ]
2.
x = −3, y = 7
5.
a.
The graph crosses the x-axis at (–3, 0). Thus, the x-intercept is –3. The graph crosses the y-axis at (0, 5). Thus, the y-intercept is 5.
b.
The graph does not cross the x-axis. Thus, there is no x-intercept. The graph crosses the y-axis at (0, 4). Thus, the y-intercept is 4.
c.
The graph crosses the x- and y-axes at the origin (0, 0). Thus, the x-intercept is 0 and the x =y-intercept −1, y = 0 is 0. x = 0, y = 1
x = −2, y = 6 x = −1, y = 5 x = 0, y = 4 x = 1, y = 3 x = 2, y = 2 x = 3, y = 1 3.
x = 1, y = 2 x = 2, y = 3 x = −4, y = 3 x = −3, y = 2 x = −2, y = 1