Example

Verifying the Slope and y-Intercept of y=12x+3y = \frac{1}{2}x + 3 from its Graph

By examining the graph of the linear equation y=12x+3y = \frac{1}{2}x + 3, one can visually verify its slope and y-intercept. The graph crosses the y-axis at the point (0,3)(0, 3), confirming the y-intercept is (0,3)(0, 3). Starting from this intercept and tracing the line to another integer coordinate, such as (2,4)(2, 4), reveals a rise of 11 unit upwards and a run of 22 units to the right. Using the slope formula m=extriseextrunm = \frac{ ext{rise}}{ ext{run}}, the slope is calculated as 12\frac{1}{2}. These visually extracted values match the coefficient of xx (which is 12\frac{1}{2}) and the constant term (which is 33) in the equation, illustrating how an equation in slope-intercept form directly describes the features of its graph.

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Updated 2026-04-23

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