SOLUTION: describe how to find the slope of teh graph of linear function f given that f(1)=2 and f(3) = -1

Question 236563: describe how to find the slope of teh graph of linear function f given that f(1)=2 and f(3) = -1
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Since f(1)=2 and f(3) = -1, this means that the line goes through the points (1,2) and (3,-1)

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

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