a. Find the slope and y-intercept.
(0,59) (7,33.8)
x₁ y₂ x₂ y₂ b = 59 ⇒ The temperature is 59 ° F when altitude is 0 feet.
33.8 -59 -25.2
-------------- = ----------------- = -3/6=m ⇒ The temperature drops 3.6 degrees
7 - 0 7 every 1,000 feet.
b. Write an equation of the line.
y = -3.6x + 59
c. What is the temperature at sea level?
59 °
