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scoray [572]
3 years ago
12

Sam and Sully are electricians. The graph represents the amount in dollars that Sam charges in terms of the number of hours he w

orks. The amount in dollars that Sully charges in terms of the number of hours he works is represented by the function y = 22x + 36. The initial amount Sam charges is BLANK the initial amount Sully charges. Sam’s hourly rate is BLANK Sully’s hourly rate.

Mathematics
1 answer:
creativ13 [48]3 years ago
4 0

Answer:

The initial amount Sam charges is [$4 greater than] the initial amount Sully charges. Sam’s hourly rate is [$2 less than] Sully’s hourly rate.

A graph is attached for reference.

Step-by-step explanation:

Given is the graph that represents the amount in dollars that Sam charges in terms of the number of hours he works.

Where two points are (0,40) and (1,60).

Finding the slope,

m=\frac{(y2-y1)}{(x2-x1)} \\m=\frac{(60-40)}{(1-0)} \\m=\frac{20}{1} \\m=20

Let us find the equation now,

y-y1 = m(x-x1)

Substituting (0,40) as (x1,y1) and slope m = 20

y-40=20(x-0)\\y-40 = 20x\\y= 20x+40

Here the 'y' intercept 40 represents the initial charge of Sam.

On comparing the equations of Sam and Sully we observe that Sam initial charge is 40  dollars.

And Sully's initial charge is 36  dollars.

Thus Sam's initial charge is $4 greater than Sully's.

Similarly,

Slope represents their per hour charge.

The coefficient of 'x' represents their slope,

Slope in case of Sam,

y=20x+40 is '20'

And

Slope in case of Sully,

y=22x+36 is '22'

Thus on observing the slope 20 and 22, we say that the per hour charge of Sam is $2 less than that of Sully's.

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