NAME DATE PERIOD Lesson 5 Skills Practice

NAME _____________________________________________ DATE __________________ PERIOD _________

Lesson 5 Skills Practice

Graph a Line Using Intercepts

State the x- and y-intercepts of each function. Then graph the function.

1. 3x - 5y = 15

y

2. --12 x + 3y = -3

y

1 O1

(5, 0) x

(0, -3)

x-intercept 5; y-intercept -3

3. 4x - 6y = 12

y

2 (6, 0)

O2

x

(-1, 0)

x-intercept 6; y-intercept -1

4. 7x + 3y = -21

y

1 (3, 0)

O1

x

(0, -2)

(-3, 0) 2

O2

x

(0, -7)

Copyright ? The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.

x-intercept 3; y-intercept -2

5. -23 x - -13 y = 2

y

x-intercept -3; y-intercept -7

6. - x + y = -2

y

2

(0, 3)

O2

x

(0, -6)

1 O 1 (2, 0) x

(0, -2)

x-intercept 3; y-intercept -6

x-intercept 2; y-intercept -2

7. DRINKS Ms. Purdy bought coffee and orange juice for her

coworkers in her office. She bought x cups of coffee at $2

per cup and y cups of orange juice at $1.50 per cup.

Altogether she spent $30. This can be represented by the

function 2x + 1.5y = 30. Graph the function. Then interpret

the x- and y-intercepts. Sample Answer: The x-intercept indicates that she can buy 15 cups of coffee and no cups of orange juice. The y-intercept indicates that she can buy 20 cups orange juice and no cups of coffee.

y

(0, 20)

5

(15, 0)

O5

x

44

Course 3 ? Chapter 3 Equations in Two Variables

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