Given the function f described by f(x)=+10, Find each of the following f(0)=

Given the function h described by h(x)=9x,find each of the following
a) h(-15)
b) h(11)
c) h(34)
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h(-15)

Given the function f described by f(x)=+10,

f(0)= 10

Given the function h described by h(x)=9x, find each of the following
a) h(-15)
b) h(11)
c) h(34)
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This not a multiple choice question. It is three different questions.
To compute h(x), multiply whatever x is by 9.