SOLUTION: Q5 fit a second degree parabola to the following data: <pre> x 1 2 3 4 5 y 100 1200 1390 1625 1015</pre>

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Question 935202: Q5 fit a second degree parabola to the following data:
 
x  1     2      3      4      5
y 100   1200   1390   1625   1015
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
To get the closest fitting parabola, we use a TI-84 calculator:

Press WINDOW 

Make it read Xmin=-1, Xmax=7,Ascl=1,Ymin=-50,Xmax=1700,Yscl=100,

Press 2ND, Y=, ENTER, ENTER 

Press STAT, ENTER and enter x-values in L1 and y-values in L2

Press STAT, ->, 5  

Next to   "Store RegEQ:" Press VARS -> ENTER ENTER to get Y1 there

Scroll to "Calculate"

Press ENTER, GRAPH

See this



To see the equation, Press Y=

equation of best fitting parabola:

y=-241.0714285714x%5E2%2B1671.9285714286x-1298

Edwin