SOLUTION: Find the slope of the line with these given points (9, 3) and (3, -6)

Question 628500: Find the slope of the line with these given points (9, 3) and (3, -6)
Found 2 solutions by jim_thompson5910, lenny460:
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

Subtract from to get

Subtract from to get

Reduce

So the slope of the line that goes through the points and is

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Answer by lenny460(1073) (Show Source): You can put this solution on YOUR website!
Plot the graph of:
(9,3)
(3,-6)

rise/run = 9/6 = 3/2 = 1 1/2
The Slope is: 3/2 (or 1 1/2)

The other method:
(y2 - y1)/(x2 - x1) = 3 - (-6) / 9 - 3
3 - (-6) = 3 + 6 = 9
9 - 3 = 6
Therefore:
9/6 = 3/2 = 1 1/2
The Slope is: 3/2 (1 1/2)

The Equation of the Line is:

y = 1 1/2x - 10 1/2

obuong3@aol.com
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