SOLUTION: what is the equation, slope, and y-intercept of (-1,6) and (1,7)?

Question 555818: what is the equation, slope, and y-intercept of (-1,6) and (1,7)?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

First let's find the slope of the line through the points

and

Note:

is the first point

. So this means that and .
Also,

is the second point

. So this means that and .

Start with the slope formula.

Plug in , , , and

Subtract from to get

Subtract from to get

So the slope of the line that goes through the points

and

is

Now let's use the point slope formula:

Start with the point slope formula

Plug in , , and

Rewrite as

Distribute

Multiply

Add 6 to both sides.

Combine like terms. note: If you need help with fractions, check out this solver.

So the equation that goes through the points

and

is

The equation is y = mx+b form where m is the slope and (0, b) is the y intercept

So because m = 1/2, we see that the slope is 1/2

Since b = 13/2, the y-intercept is (0, 13/2)

If you need more help, email me at jim_thompson5910@hotmail.com

Also, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Thank you

Jim

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