Question 705004
Solve thw following problems. Slope-Intercept 
1) A salesman makes 13 dollars per item he sells. how much does he make if he sells 8 items?
f(x) = 13x
f(8) = 13*8 = $104.00
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2) A cellphone company charges a flat fee of 20 dollars plus 3 cents a call. What is the total bill if there was a total of 200 calls for the month.
C(x) = 3x+2000
C(200) = 3*200 + 2000
C(200) = 2600 cents = $26.00
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3) Write an equation to model the total earnings y(in dollars) in terms of x(the number of hours). Your rate for math tutoring is 9 dollars an hour. You earned $63 in 7 hours. Point-Slope
y = 9x
y-63 = 9x-63
y-63 = 9(x-7)
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Ans: d
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Cheers,
Stan H.
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a)y-9=7(x-63)
b)y-63=(x-9)
c)y+9=7(X-630
d)y-63=9(X-7)
e)y-9=63(X-7)