What is the amplitude of
h
(
x
)
=
7
sin
⁡
(
3
π
4
x
−
π
4
)
+
6
h(x)=7sin(
4
3π

x−
4
π

)+6h, left parenthesis, x, right parenthesis, equals, 7, sine, left parenthesis, start fraction, 3, pi, divided by, 4, end fraction, x, minus, start fraction, pi, divided by, 4, end fraction, right parenthesis, plus, 6?