SOLUTION: find the slope of the line joining the points whose coordinates are given. (a,b), (b,a)

Question 336497: find the slope of the line joining the points whose coordinates are given. (a,b), (b,a)
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
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

Factor out a -1 from the denominator.

Rearrange the terms.

Cancel out the common terms.

Simplify

So the slope of the line through the points (a,b) and (b,a) is . This is true regardless of the values of 'a' and 'b' as long as

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

Also, feel free to check out my website.

Jim
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