Cost of candy bar a

Quantity, cost
1, 1.25
2, 2.50
3, 3.75
4, 5.00
5, 6.25

The cost of Candy Bar A is displayed in the table. The proportional relationship between the cost and quantity for Candy Bar B is represented by the equation y = x. Which candy bar is the cheapest cost per bar? Enter 1 for Candy Bar A. Enter 2 for Candy Bar B.

1 answer

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.