SOLUTION: I have worked this for two hours and I give up. I keep getting it wrong. Could somebody please help me today? Suppose the monthly cost of a long distance phone plan (in dollars)

Question 177423: I have worked this for two hours and I give up. I keep getting it wrong. Could somebody please help me today?
Suppose the monthly cost of a long distance phone plan (in dollars) is a linear function of the total calling time(in minutes). When graphed, the function gives a line with a slope og 0.12. The monthly cost for 41 minutes is 18.73. What is the monthly cost for 48 minutes?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Suppose the monthly cost of a long distance phone plan (in dollars) is a linear function of the total calling time(in minutes). When graphed, the function gives a line with a slope og 0.12. The monthly cost for 41 minutes is 18.73. What is the monthly cost for 48 minutes?
----------------------------------
cost = slope*(minutes) = intercept
slope = 0.12 and you have the pair (41,18.73)
Substitute the pair into the equation to solve for the intercept value:
18.73 = 0.12*41 + intercept
intercept = 18.73 - 4.92
intercept = 13.81
----------------------
Equation:
C(x) = 0.12x + 13.81
========================
Cheers,
Stan H.
RELATED QUESTIONS
Please help me solve this I have worked on it and keep getting it wrong and would really... (answered by jim_thompson5910)

Could someone please help me with this problem? I have to correct it on my homework and... (answered by Alan3354)

Please help me solve this equation - It is in fractions- I keep getting lost in my work (answered by stanbon)

Solve by completing the square. 4x^2 = 2x - 3 = 0 I have worked this problem three... (answered by ankor@dixie-net.com)

Hi! Could you please help me solve this multi-step inequalitie: {{{ 4h-8<2(h-1) }}}... (answered by mananth)

please help me solve this problem I have tried but keep getting it wrong Simplify... (answered by Mathtut)

having trouble again. please help. I keep getting the wrong answer for a word problem, I... (answered by scott8148,edjones)

(-1,5);m=-4/7 I have asked for help but still don't know how to get to my answer. I... (answered by Alan3354)

I have to find the Recursive Definition for the sequence 0,3,7,12,18... I have tried... (answered by richard1234)