y=x-1 is a simple linear line variation of y=x. With the inclusion of a constant 1, the y intercept (when x is 0) is shifted from 0 to -1. The slope is 1, and the y intercept is -1.
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y intercept is when x is zero then you solve. slope is rise over run or y -y1 divided by x -x1 you graph by puting the y intersept on the y axis then you take the slope and do the rise then the run
The graph shifts downward (negative y) by 9 units.
the graph is moved down 6 units
The graph of the equation y=8 is a horizontal line through the y-intercept of 8. This is because since y=8, any point on the graph will have a y-coordinate of 8. This is why it is a horizontal line through (0,8).
Same way you graph y = -4x - 0.5