From 1970 to 1990 the consumer price index increased from 38.8 to 130.7. if a tube of toothpaste cost 0.77 in 1970 and the price of toothpaste increased at the same rate as the cpi from 1970 to 1990, how much did the price of a tube of toothpaste increase from 1970 to 1990

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.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

F(x)=5/6x+3 which of the following is true