I need help with 3:solve one step equations

Plz need answer now will mark which situations represent linear functions? check all that apply. a)the temperature rises and falls over the course of a day. temperature is a function of time. b)a baseball is hit into the outfield. the height of the ball is a function of time. c)a car goes 55 mph on the highway. distance is a function of time. d)a child grew 2 inches this year and 1 inch last year. height is a function of time. e)a movie director makes 2 movies per year. the number of movies is a function of the years.

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)