Mike is saving money for his first car. He already saved $300 from cutting grass last summer. He has an after school job and saves $250 from his paychecks every month. This relationship is represented by the equation y = 250x + 300, where x is the number of months and y is the cost of the car.
1. Identify the slope (m) in this relationship.
2. Explain what the slope (m) means in this situation.
3. Identify the y-intercept (b) in this relationship.
4. Explain what the y-intercept (b) means in this situation.
5. Use the equation to determine the number of months Mike will nee

- anonymous

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- anonymous

Slope: 250

- anonymous

For every month he works, he makes $250

- anonymous

y-intercept: 300

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- anonymous

meaning: the initial amount of money he had starting out was $300.

- anonymous

5. is cut off.

- anonymous

5. Use the equation to determine the number of months Mike will need to save for a car that costs $4000.
6. Use the equation to determine the maximum amount of money Mike can afford to spend on a car if he saves for 12 months.
7. Explain how the amount of time Mike will take to save for his $4000 car will change if he increased the amount of money he saved each month.
8. Explain how the amount of time Mike will take to save for his $4000 car will change if he decreased the amount of money he saved each month.

- anonymous

5. 4000 = 250x+300. Solve for x. Your answer will be in months.
6. y = 250(12) +300

- anonymous

7. Lol he would be able to afford the car faster!
8. It would take longer to save up for the car. (too bad 7 and 8 aren't more specific).

- anonymous

Thanks For Helping me I was Sooo Confused. (;

- anonymous

Do you have a good resource as far as your textbook goes?

- anonymous

Nooopeee.

- anonymous

Okay lemme see what I can do about that.

- anonymous

okay.

- anonymous

when I took algebra 7 years ago, my book was a total piece of pellet.

- anonymous

Paul's notes have always helped me for calculus and maybe the algebra ones will help for you:
http://tutorial.math.lamar.edu/Classes/Alg/Graphing.aspx

- anonymous

hahaha they censor on here!

- anonymous

Haha(: Thanks

- anonymous

So for this problem, your output (y) is in dollars and your input (x) is in months. So if they say if the amount is however many dollars, you know that you have to plug that in to y. If ask something about months, then you plug that into x.

- anonymous

When i solve for x on this problem 4000 = 250x+300. do i do 250+300 ?

- anonymous

4000 - 300 = 250x
3700 = 250x
(3700/250) = (250x/250)
3700/250 = x

- anonymous

Okay.

- anonymous

x = 14.8 months. But we're going to round up. So x= about 15 months

- anonymous

15 months

- anonymous

Does input and output stuff make sense to you?

- anonymous

yeah i get it now.

- anonymous

Yeah Our books Now Aree Stupid too

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