an 18 foot leans against a wall. The base of the ladder is 9 feet from the wall on the level ground. How many feet up the wall,
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To shift vertically the graph of the function , you have to add a constant to its expression:
If k is positive, you shift the function k units above, if k in negative, you shift the function k units below.
So, if you want to shift the graph of two units down, you have to subtract 2 (i.e., add -2):