1. 4.4
Objective: Find the slope of a line
and interpret slope as rate of change.

2. Slope of a line

3. Find the slope
• Rise = 5
• Run = 3
• Slope = 5/3
• Slope is positive
since both rise and
run are positive.
• Positive slope climbs
from left to right.

4. Find the slope
• Rise
– 1
• Run
– -2
• Slope = 1/-2
• Slope is negative since
rise is positive and run is
negative.
• Negative slope climbs
from right to left.

5. Zero Slope
• Horizontal lines
have zero slope
• 0 rise/run

6. Undefined slope
• Vertical lines have
undefined slope
• Rise/0 run

7. Slope formula
• Change in y (rise) over change in x (run)

8. Practice

9. Rate of Change