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anonymous

  • one year ago

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

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  1. pooja195
    • one year ago
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    link doesnt work

  2. freckles
    • one year ago
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    agreed with @pooja195

  3. anonymous
    • one year ago
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  4. freckles
    • one year ago
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    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: \[\frac{y_1-y_2}{x_1-x_2}=\frac{3-0}{0-(-1)}=\frac{3}{1}=3 \\ \text{ now we know the } y-intercept=3 \\ \text{ so this equation in slope-intercept form is } \\ y=mx+b \\ \text{ where } m=\frac{y_1-y_2}{x_1-x_2}=3 \text{ and } b=y-intercept=3 \\ \text{ so that is the final answer to my example} \\ y=3x+3 \\ \text{ checking...} \\ y=3(0)+3=3 \text{ good } \\ y=3(-1)+3=0 \text{ good } \]

  5. freckles
    • one year ago
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    in your picture you can clearly identify the y-intercept and the x-intercept so proceed to finding the slope

  6. anonymous
    • one year ago
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    What is the equation of the line in slope-intercept form? y = 36x − 3 y = −3x + 36 y = −3x + 12 y = −12x + 3

  7. freckles
    • one year ago
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    have you found the slope yet?

  8. freckles
    • one year ago
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    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...

  9. freckles
    • one year ago
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    what number does your line hit on the y-axis?

  10. freckles
    • one year ago
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    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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