Intermediate Algebra (11th edition)

17. 18. 19.

20. 21. 22.

23.Concept Check How is the graph of obtained from the graph of

24.Concept Check How is the graph of obtained from the graph of

Evaulate each expression. See Example 4.

30. 31. 32. 33. 34.

Graph each step function. See Examples 5 and 6.

39.Assume that postage rates are 44¢ for the first
ounce, plus 17¢ for each additional ounce, and
that each letter carries one 44¢ stamp and as
many 17¢ stamps as necessary. Graph the func-
tion defined by

on a letter weighing xounces. Use the interval

40.The cost of parking a car at an airport hourly parking lot is $3 for the first half-hour and
$2 for each additional half-hour or fraction thereof. Graph the function defined by
the cost of parking a car for xhours. Use the interval

41.A certain long-distance carrier provides service between Podunk and Nowhereville. If x
represents the number of minutes for the call, where then the function ƒ defined by

gives the total cost of the call in dollars. Find the cost of a 5.5-minute call.

42. See Exercise 41.Find the cost of a 20.75-minute call.

Find the distance between each pair of points. See Section 8.3.

43. 1 2, -1) and 1 4, 3 2 44. 1 x, y 2 and (-2, 5 2 45. 1 x, y 2 and 1 h, k 2

PREVIEW EXERCISES

ƒ 1 x 2 =0.40x +0.75

x 7 0,

y=ƒ 1 x 2 = 1 0, 2 4.

1 0, 5 4.

y=p 1 x 2 =the number of stamps

ƒ 1 x 2 = x- 3  ƒ 1 x 2 = x+ 2 

ƒ 1 x 2 = x - 1 ƒ 1 x 2 = x + 1

fi -^14  -^5  -10.1 -6.9

3

4

fl

fi

1

2

 3   18  4.5 8.7 fl

g 1 x 2 =^1 x?

ƒ 1 x 2 =x+^15 - 3

g 1 x 2 =^1 x?

ƒ 1 x 2 =x-^13 + 2

ƒ 1 x 2 = 2 x- 2 + 2 ƒ 1 x 2 =|x-3|+ 1 ƒ 1 x 2 =|x+1|- 4

ƒ 1 x 2 = ƒ 1 x 2 = 2 x+ 3 - 3

1

x+ 2

ƒ 1 x 2 =

1

x- 2

SECTION 11.1 Additional Graphs of Functions 641