Not sure about 11A but need help with the whole question please

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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.

Find the nonpermissible replacement for binthis expression. b2/5b +5