1. Lesson 8.3 Finding Slope
T/B pp

3. How do you find slope of a line using the rise over run ratio?
Essential Question:
How do you find slope of a line using the rise over run ratio?

4. Activate: y2 – y1 / x2 – x1

5. Brain POP!: Slope

6. 8.3 Vocabulary
Review: Slope (Rise over Run) = Change in y divided by change in x. y1 –y2
x1 – x2

7. 8.3 Vocabulary
Types of slopes: Positive slope: the line rises from left to right or the change is positive. ¼
Negative slope: the line falls from left to right or the change in either y or x is negative – ¼
Zero slope: the line is horizontal. 0/4
Undefined slope: the line is vertical. 5/0

9. Identify the slope:

10. Identify the slope:
Positive
Zero
Negative
Undefined

12. Finding slope from a line
Count the number of spaces up or down. Put that number as your numerator. (it is + if you went up, it is – if you went down)
Count the number of spaces over. Put that number as your denominator. (it is + if you went right, it is – if you went left)
Simplify your fraction if possible.

13. Find the slope:

15. Your Turn!

16. Your Turn!

17. Your Turn!

18. Your Turn!

20. Finding slope using the change of the y and x.
To find slope you can subtract one y value from another. Then subtract the x values. (be sure to subtract in the same order as you did the y values)
Divide your change in y by the change in x.

21. 8.3 Vocabulary
Review: Slope (Rise over Run) = Change in y divided by change in x. y1 –y2
x1 – x2

22. Video

23. Slope using change in y divided by change in x
Find two different points on the line. Identify their ordered pairs.
Subtract the y’s and x’s from each other.
Divide your y value by the x value. (or at least write as a fraction)

25. Slope using change in y divided by change in x
Find two different points on the line. Identify their ordered pairs.
Subtract the y’s and x’s from each other.
Divide your y value by the x value. (or at least write as a fraction)

27. Slope using change in y divided by change in x!
(3, 9) (2, 5) (1, 7) (4,3)

28. Cool Down! ELO Practice W/B pp. 97-98
Pair/Share: Write a function that converts x pints to y cups. Graph the function!!
Brain POP! quiz
ELO
Practice W/B pp