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Write the equation in slope-intercept form of the line that passes through the points (-3,-10) and (5,14)

User Jeff Trull
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1 Answer

21 votes
21 votes

Answer:

y = 3x -1

Explanation:

General equation of slope intercept:

y= mx +b , where m is the slope and b is the y intercept

>find slope for line going trough the points (x1=-3, y1=-10) and (x2=5,y2=14)

m = (y2-y1)/ (x2-x1) = (14- - 10)/ (5- -3)= (14+10)/ (5+3)= 24/8 = 3

m= 3

y= 3x +b

>find the y intercept by substituting one of the points in the equation

for (-3, -10) the equation should check because the point belongs to the line with this equation

y = 3x+b

-10 = 3*(-3) +b

-10 = -9 +b

-10+9 = b

-1 = b

> the equation in slope-intercept form of the line that passes through the points (-3,-10) and (5,14) is y = 3x -1