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Write the equation of the line that passes through (5, 6) and (8, 4) in slope-intercept form.

User Ludovic C
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2 Answers

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I hope this helps, you can ask any questions for clarification

No links, there are no pictures, just the question Write the equation of the line-example-1
User Fjlksahfob
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8 votes

To write something in slope-intercept form

⇒ need to know what slope-intercept looks like:
y = mx +b

  • m: the value of the slope
  • b: y-intercept

Let us first find the slope:

Formula of slope =
(y2-y1)/(x2-x1)

  • (x1,y1): (5,6)
  • (x2,y2): (8,4)

Slope =
(4-6)/(8-5) =-(2)/(3)

Lets now write in point-slope form:


(y-y0)=m(x-x0)

  • (x0,y0): any point on the line --> (5,6)
  • m: value of slope


y - 6 = -(2)/(3) (x-5)

To write it into slope-intercept form, we must solve for y


y = -(2)/(3)(x-5)+6 =-(2)/(3)x+(10)/(3) +6\\y = -(2)/(3) x+(10)/(3)+(18)/(3) \\y = -(2)/(3)x+(28)/(3)<-- slope-intercept form

Hope that helps!

User Susantjs
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