The above information is from your computer : be sure it is correct. For grade credit, submit over the internet by 11:59 PM (= 23:59 hours) on Sunday 31 January 2016 
Average grade on Fall 2015 paper test #1 : 7.08 
[1] 
(a)(2 pts) Cell Touch (a phone company) just breaks even when a customer uses his cell phone
40 minutes per month, but makes a profit of $20 when that customer uses 80
minutes per month. If P is the profit Cell Touch makes on a customer
who uses his cell phone x minutes per month, complete a linear equation
relating P and x below. Enter numbers below, such as 3, 0, or 5.6 Scoring : One point for each correct number below 
P = x + 


(b)(1 pt) Use your mouse at the right to create a line L parallel to the line joining (1,2) and (5,6). To keep your chosen line visible, slide your mouse off the bottom edge of the graph. 

(c) Enter numbers below which complete the equation of the line L which you
were asked to display in [1b] above. Your equation will be in
slopeintercept form ( y = mx+b ) : Scoring : 1 pt for each correct number below 

y = x + 



[2](a)  (1 pt) Lara is about to receive $40,000 from a bond bought 4 years ago at an annual interest rate of 7% compouded monthly. How much did Lara pay for this bond? (See instructions above) 

[2](b)  (2 pts)Mrs. Betz signs a contract to lease a car from Ace Rentals; the rental payments are $450 at the end of each month for 2 years. Ace Rentals immediately sells this contract to it's bank. If the annual interest is 9% compounded monthly, what should the bank pay to Ace Rentals? (See instructions above) 

[2](c)  (2 pts) The price tag on Chris' new car is $12,OOO. Chris makes a down payment of 25% of that price, and finances the rest with a loan bearing 12% annual interest compounded monthly, to be paid off in equal amounts at the end of each month for 36 months. What is Chris' monthly payment? (see directions in the box above) 

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