An electrician uses the function f(x) = 60 + 40x to calculate the total cost, in dollars, for a service call that takes x hours to complete. what does the coefficient 40 represent?
a) the electrician works 40 hours.
b) the electrician charges $40 per hour.
c) the electrician drives 40 miles to work.
d) the electrician charges a $40 trip charge.

B) The electrician charges $40 per hour.

Step-by-step explanation:

From the question, we were being told that An electrician uses the function

f(x) = 60 + 40x  

to calculate the total cost (in dollars) for a service call which takes x hours to complete.

It means that the electrician charges a service call fee of $60 plus  $40 per hour, the x represents the number of each hour he charges the extra $40

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

the answer is 3/2 and for decimal: 1.5

hope i

-lavira: )