1. Algebra 1
Lesson 7.4 Slope

2. Review: basics
x-axis, y-axis
ordered pair (x,y)
+, -

3. Table Discussion
SLOPE

4. Lombard Street
San Francisco, CA

6. Which line describes the following slopes:
positive, negative, undefined, zero
10
9
8
7
6
5
Line 1
4
Line 2
3
2
1
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1
1
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
2
3
4 5 6
7
8
9 10
Line 3
Line 4

7. Slope: steepness of a line
vertical change
horizontal change
=
rise
run
=

8. positive
negative
zero
undefined

9. SMOTD
How do you find the slope bewteen 2 points?
1) measure the vertical (rise) and horizontal
(run) distance between 2 points
2) use slope formula

10. find the slope:
rise
run
=

11. find the slope:
rise
run
=

12. Do #1 on your worksheet

13. Slope formula:
y2 - y1
m = x2 - x1
vertical change
horizontal change
=
rise
run
=

14. Slope Formula Lyrics
I'm gonna find the slope
'cuz I got the formula in my pocket
m equals y2 minus y1 over
x2 minus x1
y2 - y1
m = x2 - x1

15. (1,9)
(0,0)
(-1,-9)