Writing Linear Equations - Ms. Wilson's Math Classes

NAME

2-4 Practice

DATE

PERIOD

Writing Linear Equations

Write an equation in slope-intercept form for the line described.

1. slope 2, y-intercept at 0

y = 2x

3. perpendicular to y = -14 x + 2, passes through (0, 0)

y = - 4x

5. perpendicular to y = - -12x + -23, passes through (2, 3)

y = 2x - 1

2. parallel to y = 4x + 2, y-intercept at 4

y = 4x + 4

4. parallel to y = ?3x + 4, x-intercept at 4

y = -3x + 12

6. slope - -23, x-intercept at 3

y = - -23 x + 2

Write an equation in slope-intercept form for each graph.

Copyright ? Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.

7.

y 4

2 (0, 2)

-4 -2 O -2

2 4x

-4

8.

y

4

(4, 4)

2

-2 O 2 4 x -2 (0, -2)

9.

y

(-3, 3)4

2

-4 -2 O 2 4 x -2 (3, -1)

y = 2

y = -32 x - 2

y = - -23 x + 1

Write an equation in slope-intercept form for the line that satisfies each set of conditions.

10. slope -5, passes through (-3, -8)

11. slope -45 , passes through (10, -3)

y = -5x - 23

12. slope 0, passes through (0, -10)

y = -45 x - 11

13. slope - -23, passes through (6, -8)

y = -10

14. parallel to y = 4x - 5, y-intercept at -6

y = - -23 x - 4

15. slope -16, x-intercept at -1

y = 4x - 6

16. perpendicular to y = 3x - 2 passes through (6, -1)

y = - -13 x + 1

y = -16 x + -16

17.

parallel to y =

y = -23 x - 6

-23

x

-

10,

x-intercept

at

9

18. passes through (-8, -7), perpendicular to the graph of y = 4x - 3 y = - -14 x - 9

19. RESERVOIRS The surface of Grand Lake is at an elevation of 648 feet. During the

current drought, the water level is dropping at a rate of 3 inches per day. If this trend

continues, write an equation that gives the elevation in feet of the surface of Grand Lake

after x days. y = -0.25x + 648

Chapter 2

26

Glencoe Algebra 2

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