Posted by **Pam** on Friday, September 13, 2013 at 11:13pm.

What's the equation of the line containing the given pair of points.

(1,4) and (3,5)

- Math -
**Reiny**, Saturday, September 14, 2013 at 12:01am
Easiest way:

slope = 1/2

so the equation must be

x - 2y = c

but (1,4) lies on it, so

1 - 8 = c = -7

x - 2y = -7

or:

slope = 1/2

so the equation is

y = (1/2)x + b

but (1,4) lies on it, so

4 = (1/2)(1) + b

4 - 1/2 = b

b = 7/2

y = (1/2)x + 7/2 , which is the same as my first equation.

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