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Mathematics 12 Online
OpenStudy (anonymous):

What is the equation of the line in slope-intercept form?http://learn.flvs.net/webdav/assessment_images/educator_mjprealgebra_v16/mjprealgebra_segment2_test1_g5_c1.jpg

pooja195 (pooja195):

link doesnt work

OpenStudy (freckles):

agreed with @pooja195

OpenStudy (anonymous):

OpenStudy (freckles):

but an example assuming you are given a graph: we want slope-intercept form for: the line hits the y-axis at 3 ( this point is (0,3) and the line hits the x-axis at -1 (this point is : (-1,0) so to find the slope you do: \[\frac{y_1-y_2}{x_1-x_2}=\frac{3-0}{0-(-1)}=\frac{3}{1}=3 \\ \text{ now we know the } y-intercept=3 \\ \text{ so this equation in slope-intercept form is } \\ y=mx+b \\ \text{ where } m=\frac{y_1-y_2}{x_1-x_2}=3 \text{ and } b=y-intercept=3 \\ \text{ so that is the final answer to my example} \\ y=3x+3 \\ \text{ checking...} \\ y=3(0)+3=3 \text{ good } \\ y=3(-1)+3=0 \text{ good } \]

OpenStudy (freckles):

in your picture you can clearly identify the y-intercept and the x-intercept so proceed to finding the slope

OpenStudy (anonymous):

What is the equation of the line in slope-intercept form? y = 36x − 3 y = −3x + 36 y = −3x + 12 y = −12x + 3

OpenStudy (freckles):

have you found the slope yet?

OpenStudy (freckles):

and you really don't have to do any math on this one the choices given make the answer really obvious since the y-intercept is...

OpenStudy (freckles):

what number does your line hit on the y-axis?

OpenStudy (freckles):

whatever number you say (if you look at the right axis anyways) you can replace the b in: y=mx+b with it

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