Lesson 8.3 (part 1) Slope
Slope is the ratio that describes the tilt or slant of a line If a line slants up from left to right, it has a positive slope. If a line slants down from left to right, it has a negative slope.
Slope formula Slope = rise vertical change run horizontal change Find the slope of the line shown in this graph.
Your turn Just by looking tell if the line has a positive or negative slope. Then use the slope formula to find the slope of this line.
If you know 2 points on a line you can calculate the slope another way. y2 – y1 This is also known as slope = x2 – x1
Find the slope of the line through each pair of points.
Special Slopes Horizontal and Vertical Lines
Practice a few Find the slope of each line.
Practice Find the slope of the line through E(7, 5) and F(-2, 0). Find the slope of this line.
Tonight’s Assignment Lesson 8.3 (page 414) # 1-10 all, 21, 23, 24, 52 -57 all