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Mathematics 13 Online
OpenStudy (starfireandrobin):

Can somebody please help me and explain to me step by step how to complete this "real-world linear relationship"? The problem is in the replies.

OpenStudy (starfireandrobin):

OpenStudy (pinkluka):

is this 8th grade?

OpenStudy (starfireandrobin):

This is 8th grade work, but in a 9th grade lesson.

OpenStudy (starfireandrobin):

Basically for review.

OpenStudy (starfireandrobin):

I've always had my troubles with these equations and graphs and whatnot.

OpenStudy (pinkluka):

you are in k12?

OpenStudy (starfireandrobin):

Yes.

OpenStudy (pinkluka):

hold on let me draw something that might help

OpenStudy (will.h):

rate of each plumber is the slope ideas? HINT: that is a linear equation

OpenStudy (will.h):

in plumber 1 we hvae to find the slope we can do that by using y2 - y1/ x2-x1 we have the points (0,60) (6,600) can you find it?

OpenStudy (starfireandrobin):

Ah @Will.H , I know how to do this. Give me a second. And sorry for a little late response, I was watching a graphing video.

OpenStudy (will.h):

No problem let me know if you need additional help

OpenStudy (starfireandrobin):

Alright, from the y2-y1/x2-x1 equation, I got 540/6. Doing the division I got 90.

OpenStudy (will.h):

therefor the rate of plumber 1 is 90

OpenStudy (starfireandrobin):

Is this plumber 1's cost per hour?

OpenStudy (starfireandrobin):

Ah, that's what I thought.

OpenStudy (starfireandrobin):

So then I solely need help with the second one now.

OpenStudy (will.h):

plumber 2: in the original form of linear equation we have y = mx + b where m is the slope (rate of change) ideas about plumber 2 rate?

OpenStudy (starfireandrobin):

We have to find the value of X in this equation, correct?

OpenStudy (will.h):

no they just want to know the rate which is in the original equation y = mx + b it is m so in the equation of plumber 2 y = 105x + 75 what is m here?

OpenStudy (starfireandrobin):

105?

OpenStudy (will.h):

y = mx + b y = 105x + 75 y is y and m is? and x is x and b is 75 yess indeed 105

OpenStudy (starfireandrobin):

I got it correct, thank you!! One more question though. What IS "M"? I know it's the rate in this problem, but what does M mean? and B? I'm sorry if I'm sounding confusing.

OpenStudy (will.h):

m is the slope and b is the y intercept when x = 0

OpenStudy (will.h):

let me know if you have further questions\ feel free to ask them

OpenStudy (starfireandrobin):

Ah, I do remember that now. Thank you so much for everything :)

OpenStudy (will.h):

you welcome :)

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