For each of the following functions, determine all horizontal intercepts. Try to determine these algebraically first then verify your answers by graphing the functions on your calculator. a. h(x) = 4(x – 8) +2 Preview T = b. b(x) x(12 – 2x)(9 – 2æ) Preview

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter1: Equations, Inequalities, And Mathematical Modeling
Section: Chapter Questions
Problem 22T: On the first part of a 350-kilometer trip, a salesperson travels 2 hours and 15 minutes at an...
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The actual distance (in miles) is 28 times as large as the corresponding distance on the map (in inches).
This table shows pairs of lengths on the map and the corresponding actual distances. The graph on the
right shows the same pairs represented in the table as points and the trace that shows all possible pairs of
corresponding distances on the map (in inches) and actual distances (in miles).
450
distance on the map
actual distance
28(1.25) = 35 miles
28(2.7) = 75.6 miles
400
1.25 inches
(14, 392)
350
2.7 inches
%3D
300
28(6.5) = 182 miles
28(14) = 392 miles
6.5 inches
250
14 inches
200
(6.5, 182)
150
100
(2.7, 75.6)
50
(1.25, 35)
2
10 12 14
4
16
distance on the map (in inches)
We can scan the above graph and see that each value of the distance in inches on the map, n, (indicated on
the horizontal axes), corresponds to exactly one distance (in miles) on the road, d.
For each of the following functions, determine all horizontal intercepts. Try to determine these
algebraically first then verify your answers by graphing the functions on your calculator.
a. h(x) = 4(x – 8) + 2
|
Preview
b. b(x) = x(12 – 2x)(9 – 2æ)
Preview
Submit
actual distance (in miles)
Transcribed Image Text:The actual distance (in miles) is 28 times as large as the corresponding distance on the map (in inches). This table shows pairs of lengths on the map and the corresponding actual distances. The graph on the right shows the same pairs represented in the table as points and the trace that shows all possible pairs of corresponding distances on the map (in inches) and actual distances (in miles). 450 distance on the map actual distance 28(1.25) = 35 miles 28(2.7) = 75.6 miles 400 1.25 inches (14, 392) 350 2.7 inches %3D 300 28(6.5) = 182 miles 28(14) = 392 miles 6.5 inches 250 14 inches 200 (6.5, 182) 150 100 (2.7, 75.6) 50 (1.25, 35) 2 10 12 14 4 16 distance on the map (in inches) We can scan the above graph and see that each value of the distance in inches on the map, n, (indicated on the horizontal axes), corresponds to exactly one distance (in miles) on the road, d. For each of the following functions, determine all horizontal intercepts. Try to determine these algebraically first then verify your answers by graphing the functions on your calculator. a. h(x) = 4(x – 8) + 2 | Preview b. b(x) = x(12 – 2x)(9 – 2æ) Preview Submit actual distance (in miles)
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