The following table shows the price P, in dollars, of a popular electronics item t months after its initial offering.
t 0 1 2 3 P 710 680 650 620?
A: Complete a table of changes to show that the data are linear.B: Find a linear model for the data.C: Explain in practical terms the meaning of the slope of the linear function you found in part B.
What will be an ideal response?
| Change in t | From 0 to 1 | From 1 to 2 | From 2 to 3 |
| Change in P | -30 | -30 | -30 |
?
B: 
C: The cost of the item is decreasing by $30 each month.
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