To find the gift card balance \( b \) after \( w \) weeks, you can use the equation \( b = 40 - 8w \). Let's calculate the balance for each specified week:
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For \( w = 2 \): \[ b = 40 - 8(2) = 40 - 16 = 24 \]
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For \( w = 3 \): \[ b = 40 - 8(3) = 40 - 24 = 16 \]
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For \( w = 4 \): \[ b = 40 - 8(4) = 40 - 32 = 8 \]
Now, we can fill in the table:
| w (number of weeks) | b (gift card balance) | |---------------------|-----------------------| | 2 | 24 | | 3 | 16 | | 4 | 8 |
So the balance on the gift card after 2 weeks is $24, after 3 weeks is $16, and after 4 weeks is $8.