Equation

8) y = 2x + 5: (8, ), (-1, ), ( , -1)

18) y = -x + 4

X Y

-2

0

2

0

-2

70.) x - 2y = 6

Section 3.2: Exercise 8, 10, 42, and 52

Graph the line with the given point and slope

42) The line through (-2, 5) with slope -1

52) Draw l1 through (-4, 0) and (0, 6). What is the slope of any

line parallel to l1? Draw l2 through the origin and parallel to l1.

Section 3.3: Exercise 8, 10, 32, 66, 72

Find the slope and y-intercept for each line that has a slope

and y-intercept.

32) x + 2y = 3

66) y + 4x = 8

72) y = x + 7

Y = -x + 2

Section 3.4: Exercise 10, 24, 56, 62

Write each equation in slope-intercept form.

10) y + 3 = -3(x - 6)

Find the equation of the line that goes through the given point

and has the given slope. Write the answer in slope-intercept

6) form.

24) (-1, -5), -8

56) The line is parallel to -3x + 2y = 9 and contains the point

(-2, 1).

Find the equation of each line in the form y = mx + b if

possible.

62) The line through (3, 2) with undefined slope

Section 3.5: Exercise 6, 8, 18, 26

Write a formula that expresses the relationship described by

each statement. Use k for the constant in each case.

6) m varies directly as p.

8) u varies inversely as n.

Find the variation constant, and write a formula that expresses

the indicated variation.

Solve each variation problem.

26) n varies directly as q, and n = 39 when q = 3. Find n when q = 8.

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