Final answer:
The equation of the line is y = x. This equation represents a line with a slope of 1 and passes through the origin (0,0).
Step-by-step explanation:
The equation of the line represented by y = x is b) y = x.
This equation is in the form y = mx, where m represents the slope of the line. In this case, the slope is 1, which means that for every unit increase in x, there is a corresponding unit increase in y. The line passes through the origin (0,0).