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Mathematics 21 Online
OpenStudy (anonymous):

Find the equation of the line below. Arrange your answer in the form y = mx + b, where b is the constant.

OpenStudy (anonymous):

OpenStudy (lucaz):

you see from the graph that x increases by 4, y decreases by 3, right?

OpenStudy (lucaz):

@Annа ?

OpenStudy (anonymous):

yup @lucaz

OpenStudy (lucaz):

so, this is how you find the slope when you have a graph

OpenStudy (lucaz):

slope m = -3/4

OpenStudy (anonymous):

thats no right, ive tried that @lucaz

OpenStudy (lucaz):

-3/4 is not correct?

OpenStudy (anonymous):

yes

OpenStudy (lucaz):

how come? you can also try the formula \[\large m=\frac{y-y_1}{x-x_1}\]

OpenStudy (anonymous):

i got it. its -3x/4 +3

OpenStudy (lucaz):

yeah, -3/4 is the slope as I said..

OpenStudy (lucaz):

and the y intercept is 3, you got it right

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