[need help pls!] Which graphs shows that y varies directly as x?

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.

What is the lcm of 16 and 40 ? 24 and 40 ?

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)