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Mathematics 18 Online
OpenStudy (anonymous):

The line of best fit for a scatter plot is shown: What is the equation of this line of best fit in slope-intercept form? (4 points) y = –6x + y = 6x + y = x + 6 y = x + 6

OpenStudy (anonymous):

OpenStudy (anonymous):

@BloomLocke367

OpenStudy (bloomlocke367):

well, what can you tell me about that line (i.e. positive or negative slope, y-intercept?)

OpenStudy (anonymous):

negative?

OpenStudy (bloomlocke367):

Yes! now does that rule any answers out for you? slope-intercept form is y=mx+b (where m is slope and b is y-intercept)

OpenStudy (anonymous):

umm in the question it forgot to put 3/4 in some places this is what the questions looks like this

OpenStudy (anonymous):

and i don't know

OpenStudy (bloomlocke367):

well, you can rule out any with a positive slope...because you already established that it has a negative slope.

OpenStudy (anonymous):

ok so not B or C

OpenStudy (bloomlocke367):

don't you mean b or d?

OpenStudy (bloomlocke367):

Next, you can determine the y-intercept... that would leave you with only one option left.

OpenStudy (anonymous):

it has to be either A or C ( i meant D it is not B or D) A is y = –6x + 3/4 C is y = 3/4x + 6

OpenStudy (anonymous):

C?

OpenStudy (bloomlocke367):

yes! do you understand why?

OpenStudy (anonymous):

kind of

OpenStudy (bloomlocke367):

what do you mean kind of? what don't you understand?...

OpenStudy (anonymous):

i don't understand how A dosen't have a y intercept or do i need to find the one with the same y intercept as my graph

OpenStudy (bloomlocke367):

What do you mean A doesn't have a y-intercept?

OpenStudy (anonymous):

like does c have to have the same y intercept as the graph and thats what makes it the right answer

OpenStudy (bloomlocke367):

yes :)

OpenStudy (bloomlocke367):

do you know what it means by y-intercept?

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