What is the equation of a horizontal line passing through the point (3, 7)?

The equation of a horizontal line is always in the form of y = k, where k is a constant.

Since the line passes through the point (3, 7), we know that the y-coordinate is 7.

Therefore, the equation of the horizontal line passing through the point (3, 7) is y = 7.

The equation of a horizontal line is always y = k, where k is a constant.

In this case, the line passes through the point (3, 7). The y-coordinate of this point is 7.

Therefore, the equation of the horizontal line passing through the point (3, 7) is y = 7.