SOLUTION: I am totally stuck on this.. It costs a $18 flat fee to rent a lawn mower plus $4 a day starting with the first day. a) write an equation in the form y=mx+b that represents the

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: I am totally stuck on this.. It costs a $18 flat fee to rent a lawn mower plus $4 a day starting with the first day. a) write an equation in the form y=mx+b that represents the      Log On


   

Question 907622: I am totally stuck on this..
It costs a $18 flat fee to rent a lawn mower plus $4 a day starting with the first day.
a) write an equation in the form y=mx+b that represents the situation
b) the ordered pair associated with the x-value of 5 is...

Thank you!
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
You might want y to represent cost of renting the lawnmower.

Let y be cost
Let x be days of rent

The $4 is included with the days at x=1, but would be not included for x=0, or zero days of rent. The flat fee would still be used, but in practice, a person would not be charged any such $18 if he not renting any lawnmower.

At x=0, y=18; and for each 1 day increase, the $4 per day is applied, which becomes the slope of the equation; the 18 is the y-intercept.

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