The linear plot shows how the air temperature changes with the altitude of a mountain located nearby. According to the plot, which statement is true?
Air Temperature
vs. Mountain Height
The average temperature on top of the mountain is
about -2°C.
20
10
The air temperature increases about 10°C for every
1000-meter increase of altitude
0
Air Temperature (°C)
-10
The air temperature at the base of the mountain is
about 18°C.
-20
o 1000 2000 3000 4000 5000 X
Mountain Height
(in meters)
The air temperature at the base of the mountain is
about -22°C

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno step statement reason 1 ∠oln ≅ ∠lno given 2 draw oe as a perpendicular bisector to ln by construction 3 ∠leo ≅ ∠neo transitive property of equality 4 m∠leo = 90° definition of a perpendicular bisector 5 m∠neo = 90° definition of a perpendicular bisector 6 le ≅ en definition of a perpendicular bisector 7 δole ≅ δone side-angle-side (sas) postulate 8 ol ≅ on cpctc nina made two errors in the proof. identify and correct the errors.