According to charles law, the pressure P in pascals of a fixed volume of gas is linearly related to the temperature T in degrees celcius. In an experiment, it was found that when T =40, P=90 and when T=80, P=100.

a. What is the slope of the line containing these 2 points?
b. explain the meaning of slope in this context.

Question

According to charles law, the pressure P in pascals of a fixed volume of gas is linearly related to the temperature T in degrees celcius.  In an experiment, it was found that when T =40, P=90 and when T=80, P=100.

a. What is the slope of the line containing these 2 points?
b. explain the meaning of slope in this context.

anonymous · Answer

a) Your points are (40, 90), and (80, 100). To find the slope, use the formula:
$$m=\frac{P_2-P_1}{T_2-T_1}$$
b) It's the constant of proportionality!