Pre-Calculus by Mary Jane Sterling

Author:Mary Jane Sterling
Language: eng
Format: epub
ISBN: 9781118853344
Publisher: Wiley
Published: 2014-09-04T02:22:09+00:00

Test points: Test points in the intervals , , , , and .

Illustration by Thomson Digital

317.

The graph crosses the x-axis at x = –1, x = 2, and x = 4, so the function is given by

where a is a constant. The y-intercept is (0, 8), so find a by plugging in these values and solving:

Therefore, the function is

318.

The graph crosses the x-axis at x = –3, x = –2, x = 2, and x = 3, so the function is given by

where a is a constant. The y-intercept is (0, –72), so find a by plugging in these values and solving:

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