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21) (7, -50) and (7, -26) 22) (5, 7) and (0, -9)

Question : 21) (7, -50) and (7, -26) 22) (5, 7) and (0, -9) : 2160156

Find the equation of the line that passes through the two given points. If possible, write your equation in slope-intercept form.

21) (7, -50) and (7, -26)

A) y = 7

B) x = 7

C) y = -7

D) x = -7

22) (5, 7) and (0, -9)

A) y = -x - 9

B) y = x - 9

C) y = (16/5)x - 9

D) y = - (16/5)x - 9

23) (-3, 1) and (2, -3)

A) y = x - (7/5)

B) y = -x - (7/5)

C) y = - (4/5)x - (7/5)

D) y = (4/5)x - (7/5)

24) (-3, 2) and (9, 7)

A) y = - (5/12)x + (13/4)

B) y = (5/12)x + (13/4)

C) x = - (5/12)y + (13/4)

D) x = (5/12)y + (13/4)

Find the approximate equation of the line that passes through the two points. Write the equation in slope-intercept form. Round the slope and the constant term to two decimal places.

25) (2.2, 5.6) and (4.2, 3.8)

A) y = -1.11x + 8.04

B) y = 2.55x + 0.9

C) y = 0.9x + 3.62

D) y = -0.9x + 7.58

26) (3.8, -3) and (2.7, 4.8)

A) y = -0.79x + 1.78

B) y = 7.09x + -29.95

C) y = -0.14x + 29.6

D) y = -7.09x + 23.95

Find an equation of the line that contains the given point and is parallel to the given line. If possible, write your equation in slope-intercept form.

27) (5, 2), y = 2x

A) y = 2x

B) y - 2 = 2x - 5

C) y = 2x + 8

D) y = 2x - 8

28) (8, 2), y = 9

A) y = 2

B) y = 9

C) y = -2

D) y = 8

29) (6, 7), x = 8

A) x = 6

B) y = 7

C) x = 7

D) y = 8

30) (4, 1), 2x + 9y = -37

A) y = - (9/2)x + (1/2)

B) y = - (2/9)x + (17/9)

C) y = (2/9)x + (17/9)

D) y = - (2/9)x + (1/2)

31) (-5, 0), 5x - 6y = -1

A) y = (5/6)x + (25/6)

B) y = - (6/5)x + (25/6)

C) y = - (5/6)x + (25/6)

D) y = (6/5)x + (25/6)

Find an equation of the line that contains the given point and is perpendicular to the given line. If possible, write your equation in slope-intercept form.

32) (4, -3), y = -4x + 4

A) y = 4x - 4

B) y = - (1/4)x - 4

C) y = -4x - 4

D) y = (1/4)x - 4

33) (2, -3), y = (1/8)x + 2

A) y = 8x - 13

B) y = - 8x + 13

C) y = - 8x - 13

D) y = - (1/8)x - (13/8)

34) (5, 3), x – 5y = 7

A) y = 5x - 28

B) y = - (1/5)x - (28/5)

C) y = - 5x + 28

D) y = - 5x - 28

35) (4, -2), 2x + 5y = 18

A) y = - (2/5)x - (1/12)

B) y = - (5/2)x + 12

C) y = (2/5)x - (1/12)

D) y = (5/2)x - 12

Find an equation for the line.

36)

A) y = - 10x + 25

B) y = - (1/10)x - (8/35)

C) y = - 10x - 47

D) y = - 10x - 35

37)

A) y = - 5x + 8

B) y = - 8x - 5

C) y = 5x - 8

D) y = 8x - 5

38)

A) y = 2x + 9

B) y = - 9x - 2

C) y = - 9x + 2

D) y = 9x - 2

Use the table to answer the question.

39) Let y be the value of a house (in thousands of dollars), x years after it is purchased. Some pairs of values are listed in the table below.

Find an equation that describes the relationship between x and y.

A) y = 3x

B) y = 3x - 73

C) y = 3x + 73

D) y = -3x + 73

40) Let y be the value of a computer (in hundreds of dollars), when it is x years old. Some pairs of values are listed in the table below.

Find an equation that describes the relationship between x and y.

A) y = -0.25x + 9

B) y = -0.25x - 9

C) y = 0.25x - 9

D) y = -0.25x

Solution
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