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whuseby

USA
Joined: Nov 4, 2010
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Plotting (x,y) Coordinates

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Maybe I missed it, but where do you enter the (x,y) coordinates of a known linear function and have the calculator determine the function y=mx+b (slope and y-intercept) and also graph it?

[Nov 6, 2010 1:23:36 PM]

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pskinner

Joined: Apr 2, 2005
Posts: 797
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Re: Plotting (x,y) Coordinates

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Maybe I missed it, but where do you enter the (x,y) coordinates of a known linear function and have the calculator determine the function y=mx+b (slope and y-intercept) and also graph it?

Sounds like you want to enter points (x1,y1) and (x2,y2) and have a "calculator" determine the equation. Best we can do is point you in the direction to solve the problem. First, compute m:

m=(y2-y1)/x2-x1).

Then, plug in y2=m*x2+b and solve for b. Then you will have the equation.

Once you have the equation, you can get the graph by entering mx+b into the basic graphing calculator.
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Principal Skinner

[Nov 8, 2010 10:04:04 PM]

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