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Reposting under the Algebra section. I need help with 7 and 8

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

Okie, thanks!!

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

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

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.

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!!

you're welcome