1. Section 4.5 The Slope of a Line Goal: Find the slope of a line.

2. Different Slopes of Lines–
Positive Slope– up from left to right.
Negative Slope– down from left to right.
(–3, 2)
(4, 2)
(4, 1)
(4, –2)
No Slope– Vertical Line.
Zero Slope– Horizontal Line.

3. Slope– The direction of a line.
The Slope of a Line
Slope– The direction of a line.

4. The Slope of a Line x1 y1 x2 y2
Find the slope of a line that passes through the points (2, –3) and (–5, –4).

5. x1 y1 x2 y2
Find the slope of a line that passes through the points (0, 3) and (6, 9). x1 y1 x2 y2
Find the slope of a line that passes through the points (-1, 5) and (–2, –8).
Find the slope of a line that passes through the points (3, –4) and (–3, –2).

6. How to find the Slopes of Lines using Graphs and Tables:2 –3 3 –7 7 3 +1 +1 +1 +2 +2 +2 x 1 2 3 4 y 5 8 11 14 x 2 4 6 8 y 5 –1 +3 +3 +3 –3 –3 –3

7. Homework Assignment #58
4.5 Practice B Sheet