+0  
 
0
49
6
avatar+383 

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?

‚Äč

THESE ARE MY ANSWERS

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. 

hoiuu  Oct 25, 2018
edited by hoiuu  Oct 25, 2018
edited by hoiuu  Oct 25, 2018
 #1
avatar+564 
+2

(c)I use desmos graphing calculator ,follow the link 

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. 

fiora  Oct 25, 2018
 #2
avatar+90968 
+2

(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  !!!!

 

 

cool cool cool  

CPhill  Oct 25, 2018
 #3
avatar+383 
0

Something like this https://snag.gy/7O5ZWF.jpg?

hoiuu  Oct 25, 2018
 #4
avatar+564 
+1

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

fiora  Oct 25, 2018
edited by fiora  Oct 25, 2018
 #5
avatar+564 
+1

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.

fiora  Oct 25, 2018
 #6
avatar+383 
0

Thank you for your time :) 

hoiuu  Oct 25, 2018

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