Identifying the general polynomial shape Example 1 General Rule: Basic polynomial function is one more that the number of direction changes.

Identifying the general polynomial shape

Example 1General Rule: Basic polynomial function is one more that the number of direction changes.

Example 2

To enter data:

STAT → Edit (Clear any data from lists – arrow up to L1 hit clear – not delete.

Enter x values in L1

Enter f(x) values in L2

2nd STAT PLOT (Plot 1 on. Make sure L1 & L2 being used

Graph (reset window settings, if needed)

Determine # of direction changes (in this case 2)

Stat → Calc → 6 (Cubic regression) OR

Y = → Vars → 5(statistics) → EQ → RegEQ

Verify that graph values are similar to table values.

Example 3

Follow the steps from Example 2. Let 1980 = Year 1, 1985 = Year 2, etc.

HW: Page 261