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Mathematics 15 Online
OpenStudy (kaloemalia):

Mrs. Solar is remodeling a house and is looking for a contractor to do the work. She is getting quotes from 3 different contractors, and will hire one of them based on the total cost. Each company uses a formula to calculate its fees based on the number of hours the work will take. Mrs. Solar modeled Contractor 1’s fee formula with the equation y = 50x + 200. (a) Graph the equation y = 50x + 200. Give each axis a label. (b)Describe what the equation y = 50x + 200 means in the real-world context. (c)Give 3 ordered pairs that are true to the equation and explain what each ordered pair me

OpenStudy (kaloemalia):

OpenStudy (kaloemalia):

@Tootles143 @Nnesha @KyanTheDoodle @jim_thompson5910 @inowalst @iamabarbiegirl @dtan5457 @Babynini

OpenStudy (kaloemalia):

@wio @geerky42 @Bee_see

OpenStudy (bee_see):

your equation is y=50x+200 ---> y=mx+b. where m is the slope and b the y-intercept.

OpenStudy (bee_see):

Your are going to start your graph is (0, 200)

OpenStudy (kaloemalia):

then (2,300) right?

OpenStudy (bee_see):

start your graph at*

OpenStudy (bee_see):

No, you are going to do rise/run.

OpenStudy (bee_see):

it's acutally (1,300)

OpenStudy (bee_see):

go up "50" and run "1"

OpenStudy (kaloemalia):

ok one second please

OpenStudy (bee_see):

oh, wait. got mixed up. from 200, go up "50" and run "1"

OpenStudy (kaloemalia):

ok

OpenStudy (kaloemalia):

how do i draw on the graph picture?

OpenStudy (kaloemalia):

so i put a mark on (1,250) ???

OpenStudy (bee_see):

OpenStudy (bee_see):

yes. you can see the points in the graph i posted.

OpenStudy (kaloemalia):

ok so that is what i draw?

OpenStudy (bee_see):

yes

OpenStudy (kaloemalia):

ok gimme a sec please!

OpenStudy (kaloemalia):

do i stop writing the (2,250), (2,300)..... i stop writing those at (4,400)

OpenStudy (kaloemalia):

?? or do i keep writing them or does it not matter?

OpenStudy (bee_see):

you can draw a line like this |dw:1428979177452:dw|but the line has to go through points (1, 250) (2, 300) (3, 250) (4, 400) (5, 450) and (6, 500) (7, 550)

OpenStudy (bee_see):

OpenStudy (bee_see):

(1, 250) (2, 300) (3, 350)* (4, 400) (5, 450) and (6, 500) (7, 550)

OpenStudy (kaloemalia):

so the line basically goes through (0,200) to (7,550) with the dots in between?

OpenStudy (kaloemalia):

lol im a little slow :P

OpenStudy (bee_see):

yes. but remember that you have to go up "50" and run "1"

OpenStudy (bee_see):

so that's part a.

OpenStudy (kaloemalia):

ahh okay! whats next?

OpenStudy (bee_see):

let's move to b. The equations is y=50x+200. 200 is a flat rate here.

OpenStudy (kaloemalia):

it means there is $200 for the work and an additional $50 for every extra hour?

OpenStudy (bee_see):

It's like someone telling you that the person can do a job for you, but you have to pay them some money first. In this case, it will be, say, $200.

OpenStudy (bee_see):

yes

OpenStudy (bee_see):

correct.

OpenStudy (kaloemalia):

yippy! okay next?

OpenStudy (bee_see):

ok. for c, we will choose 3 points from the graph. which ones do you want to use?

OpenStudy (kaloemalia):

(0,200) (1,250) and (2,300)

OpenStudy (bee_see):

OK. For (0, 200) is your starting point, right? In this point, it means you have only paid the flat rate.

OpenStudy (kaloemalia):

ok so i only paid for the job to be done so yes!

OpenStudy (bee_see):

then go to to point (1, 250). Remember the equation y=50x+200. x=hours=1, right?

OpenStudy (bee_see):

You have paid for the flat rate (200) and they have worked for an hour, which costs you each $50. In total, you have paid 250 for the work.

OpenStudy (kaloemalia):

yes

OpenStudy (bee_see):

|dw:1428980394452:dw|

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