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AP Calculus AB/BC
The equation y = 0 represents a horizontal line in the coordinate plane that passes through the x-axis. It divides the coordinate plane into two halves vertically.
A mathematical statement that asserts the equality between two expressions.
Horizontal line: A line that goes straight from left to right, parallel to the x-axis.
Coordinate plane: A two-dimensional grid formed by intersecting horizontal (x) and vertical (y) axes.