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# What is the equation of the line passing through the points (-1,3 and (4,8)?

greynose | Student, Undergraduate | Honors

Posted July 30, 2011 at 1:41 AM via web

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What is the equation of the line passing through the points (-1,3 and (4,8)?

Tagged with equation, line, math, point

giorgiana1976 | College Teacher | Valedictorian

Posted July 30, 2011 at 1:46 AM (Answer #1)

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We'll recall the formula that gives the equation of a line that passes through a point and it has a known slope:

y - y1 = m(x - x1), where m is the slope

We'll recall the formula that gives the value of a slope of a line that passes through two points:

m = (y2-y1)/(x2-x1)

We'll identify the coordinates:

x1=-2,y1=5,x2=3,y2=10

We'll plug in the identified coordinates:

y - 5 = (10-5)(x+2)/(3+2)

y - 5 = x + 2

y = x + 2 + 5

The equation of the line that passes through the given points is: y = x + 7

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