Question 1066443: an electrician charges $80 plus $32 per hour
1 write an equation that represents the total fee y (in dollars) charged by the electrician for a job lasting x hours
2. find the x- and y- intercepts
3. graph the equation
4. is the value of the x-intercept applicable to the electrician? explain
I AM ASKING THESE QUESTIONS MY SON IS IN ADVANCE MATH AND NOT SURE HOW TO HELP HIM WANTED TO SEE HOW TO DO THIS KIND OF MATH SO I AM ABLE TO HELP HIM THANKS FOR YOUR HELP
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! Fee=80+32x, where x=number of hours. Units are dollars. The constant 80 is the fee that doesn't change per hour worked. The slope is the number in front of the x and here is $32 for every 1 hour. The hours are able to be determined, and they are called the independent variable. The cost is the dependent variable, depending upon hours worked, and that is on the y-axis by convention, whereas the independent variable is on the x-axis by convention.
Just coming out costs $80.
y-intercept is where x=0, and it is at (0,80)
The x-intercept is where y=0, and that is at -2.5. In these kinds of problems, the intercept may not make sense, but that is OK. The value of the x-intercept has no meaning to the electrician.
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