If you look at any graph, you'll notice that at the point where the graph crosses the y-axis, the x-value of the graph is zero . Does that give you any ideas ?
Just take the equation, call 'x' zero, then solve whatever is left for 'y'.
Substitute x value for 0 and calculate y.
To find the y-intercept of an equation, substitute x = 0 into the equation and solve for y . In the slope-intercept form y = m x + b , the y-intercept is directly given by b . This point indicates where the line crosses the y-axis.
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