Answer
a. $h(5)=12.4$
b. $h(-123)=12.4$
c. Domain:- $(-\infty,\infty)$. Range:- $\{12.4\}$.
Work Step by Step
The given function is
$h(x)=12.4$
a.
Substitute $x=5$ into the function.
$\Rightarrow h(5)=12.4$
b.
Substitute $x=-123$ into the function.
$\Rightarrow h(-123)=12.4$
c.
This is a linear function with one variable.
Hence, all real number inputs will result in single output $12.4$.
The domain is $(-\infty,\infty)$.
and the range is $\{12.4\}$.
