Answer:
[tex]g(x) = -(10)^x[/tex]
Step-by-step explanation:
For a general function f(x), a reflection across the x-axis is written as:
g(x) = -f(x)
So, if here the function is:
[tex]f(x) = 10^x[/tex]
The reflection across the x-axis is:
[tex]g(x) = -f(x) = -(10)^x[/tex]
The correct option is the first one, counting from the top.