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do you still need help
Yes. Sorry I had to log off for a bit, but yes I am in desperate need if you are still here
are you allowed to use technology? like a calculator or excel or open office?
I have a graphing calculator, TI-84 I don't think I'm allowed to use excel, open office, etc
ok let's use a TI84 then
hit the STAT key (under the DEL key) then hit enter to get into the edit list menu
I have the points entered for #7 already. The years are in L1 and the prices in L2
ok so your data is already inputted, good
now go back to the home screen (2nd -> quit) then hit the STAT key again, go to the CALC menu (scroll once to the right) and then scroll down to `4:LinReg(ax+b)`
All right, I did that and then entered to "calculate", and I have the results from that
what do you see?
I got y=ax+b a=1616.785714 b=-3116482.143
The reason I am confused on this problem is because those values don't seem to match any of the answers
hmm strange how none of the answer choices match
Yeah, that's what I'm confused on, lol!!
I know my teacher made other mistakes on this test, so maybe this is one as well.
ok I've figured it out. It's strange how your teacher went about this way instead of doing a true regression, she simply picked 2 points. In this case, the first and last points (0,20200) and (60,119000) the line through those two points is y = 1646.67x + 20200 then you plug in x = 80, since 2020-1940 = 80, to find the estimated median home price in the year 2020
I noticed that each answer choice had a y-intercept of 20200 so that meant that she made x = 0 when the year was 1940
OH! So, just to make sure I understand, if I use the years as "0,1,2,3,4,5,6" instead of "1940,1950,etc" I will calculate the right answer?
more like 0,10,20,30,40,50,60
OH! Okay!! Thank you so much!! I think I will be able to understand 8 as well. Thank you thank you!!