Posted by **Ann** on Tuesday, December 4, 2012 at 9:47pm.

Write an equation that is in slop-intercept form of the line that passes through the points: (-1/2, -1) and (3, 5/2).

- Algebra URGENT -
**Mac**, Tuesday, December 4, 2012 at 10:40pm
Use your slope formula

(-1 - 2.5) / (-.5 - 3) = -3.5/-3.5 = 1

Pick a point, does not matter which one, will get the same answer and use your point slope equation

y - 2.5 = 1(x - 3)

y = x - .5

y = x - (1/2)

- Algebra URGENT -
**Reggie**, Tuesday, December 4, 2012 at 10:40pm
m = (y2-y1)/(x2-x1)

5/2-(-1)/(3-(-1/2)=

(7/2)/7/2 =1

so slope of the equation is 1.

No substitute one of the points into point slope equation and solve into slope intercept form:

y-y1 =m(x-x1)

y-(-1)=1(x-(-1/2)

y+1=x+1/2

y = x-1/2

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