If Alex spends more than $150 today, he will overdraw his bank
2 answers:
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If h moves the graph left or right, 
(moves left)
(moves right)
If a vertical stretch by a factor of |h|, then
If h moves the graph up or down,
(moves up)
(moves down)
and h = 1
If a vertical stretch by a factor of |h|, then
If h moves the graph up or down,