Answer Submitted by Coloratus on Fri, 2012-01-06 06:59teacher rated 77 times 4.753245price: $0.00 Linear function
f(x) = 2x
is a form of linear function, generally: f(x) = ax + b
In this case b = 0, meaning that the line (graph of this function) goes through the origin of coordinate system.
a = 2, meaning that the slope of the line is 2, or the angle between the line and +x is bigger than 45°. The function is always rising.
We can draw graph if we know 2 points and draw a line between them:
f(0) = 0
f(1) = 2
So, the points are: (0, 0), (1, 2), and the graph is on the picture