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# check my work?

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here are the questions.

Contractor 3 gives Mrs. Solar the following fee table showing her charges for the contract work.

https://snag.gy/IPS06y.jpg

(a)   What is the rate of change? What does this mean in a real-world context?

(b)   Write an equation in point-slope form to represent the total cost, y, given x hours.

(c)   Graph the equation written in Part (b).

(d)   What is the y-intercept? What does this mean in a real-world context?

https://snag.gy/WSNRGe.jpg

A. \$60/hour. the contractor charges \$60 for each hour of work.

B. y = 60x

C. I  can't seem to plot this right. :(

D. the y-intercept is 0. This means the cost is \$0 when the contractor does 0 hours of work.

Oct 25, 2018
edited by hoiuu  Oct 25, 2018
edited by hoiuu  Oct 25, 2018

#1
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https://www.desmos.com/calculator

then enter "60x"

you will see

https://www.desmos.com/calculator/regbvl4d0r

For ti calcuator you need change the min and max value of y to 0 and 180 to get the correct graph. PS: I am not a TI calculator user.

A easy way to graph y=60x by hand is treat 60 dollar as one unit ........

Written until this point , I realize you can convert  1 hour to 60 minute,and then the rate of change is 1 dollar per minute and the equation is y=x where y is charge fees in dollar and x is time in minute.

Oct 25, 2018
#2
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(C)   To draw this, hoiuu....note that we have the  points   (0,0 ) ,  ( 2 , 120 )  and ( 3, 180)

Plot these points.....draw a line through them and stop  the left side  of the line at (0,0)

[ You can also plot (4, 240)  and (5, 300)  if you want to....your graph will "automatically" go through  them  !!!! ]

All the other answers are good  !!!!

Oct 25, 2018
#3
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Something like this https://snag.gy/7O5ZWF.jpg?

Oct 25, 2018
#4
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That shuld be fine, but I think you need to extend the line to the end put an arrow at the front section of the line,since 0

Oct 25, 2018
edited by fiora  Oct 25, 2018
#5
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Sorry I can't edit my previoud answer and it was incomplete. You should extend the line to the end and put an arrow at the front section.

Oct 25, 2018
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Thank you for your time :)

Oct 25, 2018