Body-heat loss due to convection depends on a number of factors. If Hc is body-heat loss due

Question:

Body-heat loss due to convection depends on a number of factors. If Hc is body-heat loss due to convection, Ac is the exposed surface area of the body, Ts - Ta is skin temperature minus air temperature, and Kc is the convection coefficient (determined by air velocity and so on), then we have
Hc = KcAc (Ts - Tα)
When Kc = 1, Ac = 1, and Ts = 90, the equation is
Hc = 90 - Tα
Sketch the graph?