Tables
Tables
Example 1
Find the equation that models this table in standard form.
x | -2 | -1 | 0 | 1 | 2 | 3 | 4 |
y | 12 | 9 | 7 | 6 | 6 | 7 | 9 |
Step 1. Find the second difference.
x | -2 | -1 | 0 | 1 | 2 | 3 | 4 |
y | 12 | 9 | 7 | 6 | 6 | 7 | 9 |
Step 2. Find the a-value.
The a-value is found by dividing the second difference by 2.
Step 3. Find the c-value.
The c-value is the constant, or the point where y = 0.
In this table, c = 7.
Step 4. Find the b-value.
Substitute a and c into the equation and solve for b.
Step 5. Substitute a, b and c into the equation.
