Question

Construct an equation and then use it to solve the problem.

(a) Pressure P is directly proportional to temperature T, and P is 23 lb per square inch when T is 46 degrees Fahrenheit. What is the pressure when the temperature is 58 degrees Fahrenheit?

Answer 1

P = kT where k is a constant
P = 23 when T = 46 so
23 = 46k
k = 0.5

thus P = 0.5T
when T=58:
P = 0.5 * 58 = 29