Question

The function T(h) = -15 + 3h represents the outside temperature (in degrees Fahrenheit) of Unalakleet, Alaska, where h represents the number of hours after midnight. The function is accurate for times between midnight and 4:00 p.m.
Determine the temperature (in degrees Fahrenheit) in Unalakleet at 3:00 a.m.

Answer 1

Since 3:00 a.m is three hours after midnight, the variable h in the function would be three.

T(h) = -15 + 3h     step 1 - write the equation
T(3) = -15 + 3(3)   step 2 - plug in h, which is three
T(3) = -15 + 9       step 3 - simplify the expression
T(3) = -6