Idiot\'s Guides Basic Math and Pre-Algebra

Chapter 12: Basics of Geometry 163

-6 -2 062

-2

2

4

6

-4

-6

-8-9 -7 -5 -4 -1-3 134 5 78 9

-8

-9

-1

-3

-5

-7

8

9

1

3

5

7

-10 10

-10

10

y

x

CHECK POINT

Label each pair of lines as parallel, perpendicular, or neither.

21. Line a has a y-intercept of 2 and a slope of -3. Line b has a y-intercept of -
    1
    2
    and
    a slope of -3.


22. Line RT has a slope of^3
    5

and a y-intercept of -4. Line PQ has a slope of^5

3

• and
  a y-intercept of 2.

23. The equation of line p is y = 2x – 5, and the equation of line q is y = 5x – 2.


24. Line XY and line WZ if X is the point (4,-2), Y is (7,6), W is (2,-8), and Z is (0, 4).


25. The line 3x – 2y = 12 and the line 2x + 3y = 12.