a. The graph of the line f(x) = 2x, is a line that intersects the y-axis at the origin with a slope of 2. Then, it passes through the point (2,4)
To graph the given function, we need to draw the line f(x) = 2x for every x-value except x = 1, and draw the point (1, -3), as follows:
b. The domain is the set of all possible x-values
The range is the set of all possible y-values
Domain: all real numbers
Range: all real numbers