Larry

I thought this is a pretty good forum and since it kinda fits in here with computers etc.

I have a TI-83 Plus and I'm wondering if this calculator is able to plot a graph with a y - intercept and another point ?
Anybody know how ? ;D

INTELCRAZY

Convert it to slope-intercept form and hit the "y=" key, then enter (slope) +/- (y-intercept) and then hit 2nd table to show the graph or you can just hit table to get a table of solutions and answers for the equation...

Larry

Could you give me the Key sequences ? you neednt tell me to press alpha and stuff but just how to get into slope and stuff >_>

EDIT:

I'm not talking about a function here btw, the problem would be something like :

Plot the line that intercepts with points (5|10) and (3|7)

INTELCRAZY

Okay if the line contains the points you have there then you would need to convert it into slope-intercept form. Do this by utilizing the slope formula..

m = y2 - y1/x2 - x1

Where m is the slope, so using slope formula on those plots.. The slope would be 3/2 (three-halves).

To determine the y-intercept, the easiest way to understand would be to graph it. Google the formula if you want to use it, I hate it though.

When I graphed my y-intercept was 3

To put this in Slope-Intercept form it's y = 3/2x + 3

So to graph it on your calculator, press the y= button, the type in 3/2x +3. Then press 2nd and then table.

You will then see the graph.....

jasonz

ha ha, im sure thats what the hw problem was asking, you just did it for him. And i dont think its possible to do that with the 83.

Get an 89 man, it is a beast.

ComputerGuru64x2

Are you talking about a plot graph?

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INTELCRAZY

Yes you can with the 83... I use 84+..... 89 may seem a beast but it cannot be used on Standardized tests nationwide and it is about useless in math like this, TI-89 is a finance calculator....

I really don't know of any other way to do it... I had a friend program my 84+ to do the y-intercept formula, then along came me and Reset it... It wouldn't hurt to learn slope-intercept form anyway... I hope you guys don't mind me asking but, when did you guys learn anything about slope-intercept form? I think I got my first sight of it in 7th grade and use it a lot in college courses.... Slope-intercept form is the basis on which this falls on...