Y-intercept
the y-coordinate of a point where a graph crosses the y-axis
In a straight line, the y-intercept is the point where the line crosses the y-axis. It is the value of the dependent variable (y) when the independent variable (x) is equal to zero. Graphically, it is the point where the line cuts through the vertical axis.
The equation of a straight line can be written as y = mx + b, where m is the slope of the line and b is the y-intercept. For example, if the equation of a line is y = 2x + 1, the y-intercept is 1. This means that if x=0, then y=1, and the line cuts through the point (0, 1) on the y-axis.
The y-intercept is important because it helps us to graph a line easily. To graph a line, we plot the y-intercept and then use the slope to plot one or more additional points. From there, we can draw a straight line through the plotted points.
In summary, the y-intercept is the value of y when x is equal to zero, and it is used to graph a straight line. The equation of a straight line is y = mx + b, where m is the slope and b is the y-intercept.
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