section5: translation parallel to the y-axistranslation parallel to the y-axis basically means
moving the graph up or down i.e.
only the y co-ordinate changes.
take the following y=f(x) for example:
the graph cuts the y-axis at y=2.
for a
y=f(x) - 1, the graph will
move down by 1 unit.
hence this graph will cut the y-axis at y=1 instead.
for a
y=f(x) + 1, the graph will
move up by 1 unit.
hence this graph will cut the y-axis at y=3 instead.
e.g. y= 2x
just remember, for a y=f(x) + a graph,
when
a>0, the graph moves
up.
when
a<0, the graph moves
down.
ah we're finally almost halfway through this whole topic! yes half a victory! time for your next victory in answering the following question:
the graph of y=f(x) undergoes a transformation to form y=2+f(x).
select the y=2+f(x) graph.
