What is the slope of the line represented by the equation y = 3x + 4?

The slope of a line in the equation of the form y = mx + b is represented by the coefficient of x, which is m. In the equation given, y = 3x + 4, the term associated with x is 3. This means that the slope of the line is 3.

The slope indicates the rate at which y changes for a unit change in x. In this case, for every increase of 1 in x, y will increase by 3. Therefore, the slope is a measure of how steep the line is and the direction it goes. Since the coefficient of x is positive, the line rises from left to right.

This understanding of the equation form clarifies why the slope's value is correctly determined as 3, making that the correct answer.