Idiot\'s Guides Basic Math and Pre-Algebra

146 Part 2: Into the Unknown

You want the points with y-coordinates that are less than^3

4

x 2. The points on the line have

y-coordinates equal to that, one side of the line has points with y-coordinates that are greater

and the other side of the line has the ones that are less. Test a point on one side of the line in the

inequality; the origin is often a convenient choice. If the result is true, shade that side of the line;

if not, shade the other side.

y

-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

Solve each equation.

31. yx≥^1
    2
     1


32. yx≤ 25 


33. yx> 54 
    34. yx<
    35. yx≤^2
    3

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