Notice the y- intercept is the same, i.e. 1, for our first
two examples. The only difference between the two
equations is the slope, and not the ‘+1’ on the end.
Note the slope of the line is the same anywhere you look; you can measure the rise and
the run anywhere on the graph. Anywhere you look, when you look at rise ÷ run, you get
the same slope.
Can you think of examples of a negative slope?
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