University:
Felician University
Course:
MATH-160 | College Algebra
Academic year:

2019
Views:

313

Pages:

14
Author:

Giselle A.

14. Josiah earns $7 an hour for washing cars as а summer job. Complete the tаЫе of ordered pairs to show his total earning fог several hours. Then express the relation as а graph. 2 3 4 5 40 35 у--30 25 20 15 10 5 о 12345678' Hours How much would Josiah earn for 12 hours of washing cars? 1 1 15. Determine if each statement about the relation {(3, 7), (5, 1 ), (б, 4), (2, 5)) is true or false. а. The domain of the relation is (2, 3, 5, б}. True False с. The value 5 is а member of both the domain and range. True False Ь. The гange of the relation is {1, 4, 5, 7}. True False Test Practice 14. Josiah earns $7 an hour for washing cars as а summer job. Complete the tаЫе of ordered pairs to show his total earning for several hours. Then express the relation as а graph. 40 $7 2 $14 3 $21 4 $28 5 $35 35 - 30 у 25 g' 20 15 10 123456 78' Hours How much would Josiah earn for 12 hours of washing cars? [$84 15. Determine if each statement about the relation {(3, 7), (5, 1 ), (б, 4), (2, 5)) is true or false. а. The domain of the relation is (2, 3, 5, б}. Ь. The range of the relation is {1, 4, 5, 7}. с. The value 5 is а member of both the domain and range. ■ ■ ■ True False True False True False Express each relation as а tаЫе and а graph. Then state the domain and range. (Example 1) Й {(8, 5), (-6, -9), (2, 5), (О, -8)} D: {-6, О, 2, 8}; R: {-9, -8, 5} . х у 8 5 -6 -9 2 5 -8 4 -4 -8 • • 4 8Х -4 • • у 2 .! 2 -1.! 2 2 2 2 -1 2.! -1 -1.! 2 2 • -1 о -1 -2 Сору and Solve Draw the tаЫе and graph on а separate sheet of paper. А company сап manufacture 825 small cars per day. (Exampl, 2) 3-4. 5ее Answer Appendix. 3. Make а tаЫе of ordered pairs in which the x-coordinate represents the number of days and the y-coordinate represents the total number of cars produced in 1, 2, З, 4, and 5 days. 4. Graph the ordered pairs. Й � Multiple Representations Refer to the tаЫе at the right. 2 х � > 3. х 825Х 1 825(1) 825 2 825(2) 1,650 3 825(3) 2,475 4 825(4) 3,300 5 825(5) 4,125 у 1) ф Multiple Representations Refer to the tаЫе at the right. а. Words Describe the pattern, if any, in the tаЫе. То get the y-value, the x-value was multiplied Ьу itself. Ь. Nurnbers Write the ordered pairs (х, у). (1, 1), (2, 4), (3, 9), (4, 16), (5, 25) х 1 1 2 4 3 4 16 5 25 с. Graphs Graph the ordered pairs on а coordinate plane. 30 27 24 21 18 15 12 9 б 3 о d. Words Describe the graph. How is it different from th1e other real-world graphs in this lesson? Sample answer: This graph curves upward. The points in all of the other graphs in the lesson lie in а straight line. 1 2 3 4 5 б 7 8 9Х +__.-о"- Chapter 4 Functions Lesson 3 Functions: Text Pg. 285 is а А tаЫе used to organize the domain, rule, and • range of а function The x-value / the value is subject to choice Function Notation: f (х) __\_\ Еха f(x) = 12х Find f( ..-6) if f(x) = Зх + 4 Find f(2) if f(x) = х - 4 Find f(ll) if f(х) - -х = You сап organize the input, rule, and output into а because it depends on the domain Choose 4 values for х to make а function tаЫе for f(x)