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?

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

#1**+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**+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 !!!!

CPhill
Oct 25, 2018