To determine which candy bar has the cheapest cost per bar, we will calculate the cost per bar for both Candy Bar A and Candy Bar B.
Candy Bar A: From the table:
- For 1 bar: $1.25 → cost per bar = $1.25
- For 2 bars: $2.50 → cost per bar = $2.50 / 2 = $1.25
- For 3 bars: $3.75 → cost per bar = $3.75 / 3 = $1.25
- For 4 bars: $5.00 → cost per bar = $5.00 / 4 = $1.25
- For 5 bars: $6.25 → cost per bar = $6.25 / 5 = $1.25
So, the cost per bar for Candy Bar A is consistently $1.25.
Candy Bar B: The equation for Candy Bar B is \( y = x \). This means the cost is equal to the quantity, so:
- For 1 bar: cost = $1.00 → cost per bar = $1.00
- For 2 bars: cost = $2.00 → cost per bar = $2.00 / 2 = $1.00
- For 3 bars: cost = $3.00 → cost per bar = $3.00 / 3 = $1.00
- For 4 bars: cost = $4.00 → cost per bar = $4.00 / 4 = $1.00
- For 5 bars: cost = $5.00 → cost per bar = $5.00 / 5 = $1.00
The cost per bar for Candy Bar B is consistently $1.00.
Comparison:
- Candy Bar A: $1.25 per bar
- Candy Bar B: $1.00 per bar
Since $1.00 (Candy Bar B) is less than $1.25 (Candy Bar A), Candy Bar B is the cheaper option.
Therefore, the answer is 2 for Candy Bar B.