The temperature of a chemical solution is originally 21^\circ\text{c}21 ? c21, degree, c. a chemist heats the solution at a constant rate, and the temperature of the solution is 75^\circ\text{c}75 ? c75, degree, c after 121212 minutes of heating.

The rate is

Step-by-step explanation:

we know that

The formula to calculate the rate or slope between two points is equal to

Let

x----> the time in minutes

y-----> the temperature in Celsius degrees

we have

Substitute the values

one that is bigger than 3 1/2