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I can't figure out how to get the Predicted cost part
how did you find 0.08 in that last box?
I have done the question like 6 times and it's always 0.08
what kind of calculator do you have?
TI-84 Plus CE
I enter in the data in L1 and L2 but can never get the answer they get
idk what the CE means, but I have a TI84 plus, so I guess that works
so you have your data into L1 and L2 did you do a LinReg ?
ok it should say something like ax+b or a+bx and then spit out what a and b are
b=-467.213 but the answer is always between like 164 to 166
hmm let me try, one sec
I guess what's the predicted cost when the miles is at 0.08?
ok I'm getting 0.08 now
and I'm not getting a number between 164 and 167 but I'm getting pretty close to it
How did you get 0.08?
well I got 0.07877 approx which rounds to 0.08
yeah using that function
I don't see it in mine :(
it's in the calc menu after you hit the stat key
btw make sure your "miles" is in the L1 column
if you put "miles" in the L2 column, you'll have to type in `LinReg(ax+b) L2,L1`
Ohh really? I've been putting it in L2 that must be the problem
Why must the miles go first?
Now I got it a=0.07877
and b is 162.95
because the equation is cost = ____ + ____ * (miles) miles is the input
Oh I see so I was doing it backwards
well they put the columns in the wrong order (probably to throw you off)
So Predicted cost should be 162.96?
I actually have to do this problem again since I already restarted it
no that value goes in the missing box
Thanks man! I guess I was getting it wrong because I was entering in L1 and L2 backwards. I have been so confused for over an hour. Thank you!
yeah I made the same mistake but swapping the columns or entering `LinReg(ax+b) L2,L1` addresses the issue
Thank you :D