Answer:
16. -20°F
17. -3
18. 13.3
19. -80°F
Explanation:
16. -20°F as shown on the graph.
17. For this we can use slope intercept form.
Slope = y₂ - y₁ ÷ x₂ - x₁
Taking two points where we are able to get the coordinates from: (0, 40) (10, 10) we can now apply the values to the equation as shown below:
(0, 40) (10, 10)
x₂ y₂ x₁ y₁
40 - 10 ÷ 0 - 10
30 ÷ -10 = -3
18. Using the information from the last question, we can create the linear equation F = -3x + 40 where F is the temperature in degrees and x is the elevation (x 1000 ft). From here, we need to input 0 for F to get our equation.
0 = -3x + 40
-40 = -3x
x = 13.3
19. For this question, we can use the same linear equation F = -3x + 40 but this time, insert 40 where x is. (40,000 ft divided by 1000 ft = 40)
F = -3(40) + 40
F = -120 + 40
F = -80°F
~Hope this Helps!~