Which is the direct linear variation equation for the relationship?
y varies directly with x and y = 12 when x = 4.
a.
y = x + 8
b.
y = 2x + 4
c.
y = 3x
d.
y = x – 8

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.

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)