Which is an equation of a direct proportion?

y=13x−2

y=3x

y=−3x+4

y=−3x

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.

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

The area of the map is the product of the length and width. write and expression for the area as the product of the two binomials do not multiply