Just need some help answering it

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

Is the power produced directly proportional to the wind speed, give reasons for your answer?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m