the table give the number of inner tubes, I, sold in a bike shop between 1985 and 1990.
year,t 1985 1986 1987 1988 1989 1990
inner tubes, I 40 56 74 91 113 127
determine which model best fits the data.

Question

the table give the number of inner tubes, I, sold in a bike shop between 1985 and 1990. 
year,t            1985  1986  1987  1988  1989 1990
inner tubes, I  40      56      74      91      113  127
determine which model best fits the data.

amistre64 · Answer

im sure there are options .....

anonymous · Answer

yeah
a. absolute value
b. quadratic
c.  exponential
d. linear.

amistre64 · Answer

hmm, the dates all go up in succession, so id say we can move these values to the origin, subtract 40 from all of them and see what we end up with

espex · Answer

Sounds like a statistics problem, make a scatter plot and draw a regression line. Since they are steadily rising I suspect you will get a linear fit.

amistre64 · Answer

regression can take forever .... find the difference between them

 40      56      74      91      113  127  ; subtract 40 from all them

 0      16      34      51      73     87  ; determine the differences
     16     18      17      22      14      ; the differences are the rates of change

since the rates of change are fairly constant, id lean towards linear as well