The y-intercept is the point where the line crosses the y-axis. If you change the y-intercept, that means that the line crosses the y-axis somewhere else. Depending on what remains constant, you may get different results. For example, if you don't change the slope, the entire line will simply move up or down.
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as the y-intercept increases, the graph of the line shifts up. as the y-intercept decreases, the graph of the line shifts down.
If the x intercept is a and the y intercept is b, then the equation of the line is bx + ay = ab
The y-intercept represents the point in which the line crosses the y-axis.
The line 'Y = - 3' has a slope of zero. Any line parallel to it also has a slope of zero. The line parallel to it with a Y-intercept of 7 is: Y = 7
The y intercept would be 3.