Apicture measuring 2.5 inch high by 6 inch wide is to be enlarged so that the width is now 18 inches how tall will the picture be

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.

When y’all answer can y’all explain too !

How to find the exponential function y=ca^x, with points (1,2) and (2,1)