1. Find the slope between the points (-4,-5) and (-7, 12)
Do Now
Find the slope between the points (-4,-5) and (-7, 12)

2. Solve word problems by using the slope formula
Slope Word Problems
Solve word problems by using the slope formula
SWBAT:

3. What is the average rate of change(slope) in terms of hours?
Slope Word Problems
A climber is on a hike. After 2 hours he is at an altitude of 400 feet. After 6 hours, he is at an altitude of 700 feet.
What is the average rate of change(slope) in terms of hours?
(6,700)
Feet
(2,400)
Hours

4. Slope Word Problems
Let’s use the slope formula to find the rate of change(slope) in terms of hours
(6,700)
Feet
(2,400)
Hours

5. What does the slope of 75 mean to us?
Slope Word Problems
So what does the answer mean?
What does the slope of 75 mean to us?
(6,700)
Feet
(2,400)
The slope means for every hour of travel the climber will go up 75 feet
Hours

6. Slope Word Problems
Now that you know the rate of change (slope) in terms of hours you should be able to predict the height of the climber for any amount of time.
(6,700)
Feet
(2,400)
Hours

7. Slope Word Problems
Can you predict the height of the climber at 9 hours?
(6,700)
At 6 hours the climber was at 700 feet.
Since the climber will climb 75 feet each hour, you could use the following to solve the problem.
Feet
(2,400)
Hours

8. Can you predict the height of the climber at 9 hours?
Slope Word Problems
Can you predict the height of the climber at 9 hours?
(6,700)
Feet
(2,400)
Hours

9. Slope Word Problems
Can you predict the height of the climber at 9 hours?
(6,700)
Feet
Doesn’t this look like something you have seen before?
(2,400)
Hours

10. Break into groups and begin working on your worksheet
Slope Word Problems
Break into groups and begin working on your worksheet