Question

the number of times a cricket chirps per minute depends upon the temperature. change the temperature to see. try it.
celsius rule:
7 12 -28
click here to reverse the relationship
chirps
per minute
temperature
celsius
4
8
12
16
20
24
56

Explanation:

Step1: Verify given formula

The Celsius Rule is $C = 7(T) - 28$, where $T$ = temperature in °C, $C$ = chirps per minute.

Step2: Test with $T=12$

Substitute $T=12$ into the formula:
$C = 7(12) - 28$
$C = 84 - 28$
$C = 56$

Step3: Match table value

The table shows 56 chirps at 12°C, which matches.

Step4: Reverse the relationship

Solve $C = 7T - 28$ for $T$:

1. Add 28 to both sides: $C + 28 = 7T$
2. Divide by 7: $T = \frac{C + 28}{7}$

Answer:

The given rule $7(12)-28$ correctly calculates 56 chirps at 12°C. The reversed relationship to find temperature from chirps is $T = \frac{C + 28}{7}$, where $T$ is temperature in °C and $C$ is chirps per minute.