Calculator Marathon

[101dalmatians]

Same as other marathons except this is on calculator...

[unparseable or potentially dangerous latex formula] : [unparseable or potentially dangerous latex formula]

One point [unparseable or potentially dangerous latex formula] on the line [unparseable or potentially dangerous latex formula] is equidistant from the points [unparseable or potentially dangerous latex formula] and [unparseable or potentially dangerous latex formula].
What is [unparseable or potentially dangerous latex formula] ?

[darksaber21]

[101dalmatians]

That's pretty cool...
Also, do you think the regression questions on the calculator test can be done faster with the HP (I have 32)?
The reason is that I just need to learn how to do this on my calculator to speed up the process of - you know answering questions...

[Zubair_Marediya]

I believe I read somewhere on this website that you use an HP32SII. That's the same one that I used along with a TI-84. In my opinion, because I felt faster with my HP, I always used that for linear regression over my TI. The steps to doing it are rather simple.

First Step
Clear all your current inputted data. Make sure you do this before attempting any linear regression problem on the test. Having data from another problem with obviously mess up your answer. You can do this by hitting the orange shift key, and then hitting the "←" key. This should lead you to the clear menu. Hit the key that corresponds to the summation symbol. It should be the very top right key ("Σ+").

Second Step
The inputting order for data points is always the y-value first, and then the x-value. The way to do this is as follows: Punch in the first y-value, hit enter, then punch in the corresponding x-value, then hit the "Σ+" key at the very top right. The screen should read "1.00" to signify that you have entered one set of x and y data points. After you input the second set of data points, the screen should read "2.00" and so forth. Repeat this process for all the needed data points.

Third Step
Once you have successfully entered all the data points, hit the blue shift key, and then hit the "LN" key. This should lead you to the L.R. function of the calculator. From here, if you want the slope of the line, simply hit the key under "m." If you want the y-intercept, simply hit the key under "b." If you want the correlation coefficient, simply hit the key under "r." You get the point.

Example:
Let's use the line y = 2x + 5.
Suppose we have the data points of (1,7),(2,9),(3,11),(4,13).
Punch in 7, ENTER, 1, Σ+, 9, ENTER, 2, Σ+, 11, ENTER, 3, Σ+, 13, ENTER, 4, Σ+
Direct yourself to the L.R. function as directed above.
You should find that m = 2, b = 5, and r = 1.

Hope this helps!

[101dalmatians]

This HP regression is really fast! Thank you!