To solve the inequality
Step 1: Isolate
-
Start by adding 15 to both sides:
-
Next, divide both sides by 5:
Step 2: Express the solution in inequality notation
The solution can be written as:
Step 3: Graph the solution on the number line
- The solution indicates that
can take any value up to and including 5. - On the number line, you would draw a closed circle (or filled circle) at 5 to indicate that 5 is included in the solution set.
- Shade the portion of the number line to the left of 5 to represent all numbers less than or equal to 5.
Number Line Representation
If you visualize the number line from -12 to 12, it will look like this:
-12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12
•----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----•=============================
^ |
5 |
Note on Coloring:
- Coloring the Number Line: Starting from -12 up to 5 (including 5), shade the area to indicate all values less than or equal to 5. The part of the number line greater than 5 should not be shaded.
Summary:
- Inequality Notation:
- Number Line Graph: Closed circle at 5 with shading to the left of 5.