SOLUTION: Find the slope of the line passing through the pair of points or state that the slope is undefined. (4,2) and (7,8) (-7,-9) and (3,-2) (6,3) and (6,-4) (7,-4) and (-9,-

Question 128493: Find the slope of the line passing through the pair of points or state that the slope is undefined.
(4,2) and (7,8)
(-7,-9) and (3,-2)
(6,3) and (6,-4)
(7,-4) and (-9,-4)
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
I'll do the first two to get you started

# 1

Let's denote the first point (4,2) as

. In other words,

and

Now let's denote the second point (7,8) as

. In other words,

and

-------------------------

Start with the slope formula

Plug in ,,,

Subtract the terms in the numerator to get . Subtract the terms in the denominator to get

Reduce

---------------------
Answer:

So the slope of the line through the points (4,2) and (7,8) is

# 2

Let's denote the first point (-7,-9) as

. In other words,

and

Now let's denote the second point (3,-2) as

. In other words,

and

-------------------------

Start with the slope formula

Plug in ,,,

Subtract the terms in the numerator to get . Subtract the terms in the denominator to get

---------------------
Answer:

So the slope of the line through the points (-7,-9) and (3,-2) is

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