1. 4-2 Word Problems again!!! Goal:
Write an equation that models a real-life situation
Eligible Content:
A / A / A / A / A / A / A

2. Vocabulary AGAIN! Slope: rate of change (y per x)
y-intercept: the beginning amount
Ordered pairs: pairing up two numbers that belong together.

3. Word Problem #1
You join a book club for a membership fee of $20, and you have to pay $3 for each book you buy. Write an equation to model this situation.
y = 3x + 20

4. Word Problem #2
You join a gym that charges a membership fee and a fee for each class you sign up for. Each class costs $10. When you signed up for 5 classes, your cost was $100. Write an equation that models this situation.
y = 10x + 50

5. Word Problem #3
A repair man charges $25 per hour and an initial fee for each repair. For 3 hour service call, you pay $115. Write an equation that models this situation.
y = 25x + 40

6. Word Problem #4
Your phone company charges you for each minute you use on your phone plus an initial fee. Your bill for one month is $105 for 200 minutes of use. Your bill for the next month is $98.70 for 158 minutes of use. Write an equation that models this situation.
y = .15x + 75

7. Word Problem #5
In 1992, there were 3200 people living in a town. In 2010, there were 5900 people living in the same town. Write an equation in slope intercept form that models this situation. Let x = 0 correspond to 1990.
y = 150x

8. Practice
Worksheet – “4-2 Word Problems AGAIN”

9. Homework
None!