The function is a simple linear function and so its nature does not limit the domain or range in any way. So the domain and range can be the whole of the real numbers. If the domain is a proper subset of that then the range must be defined accordingly. Similarly, if the range is known then the appropriate domain needs to be defined.
That depends a lot on what the function is.
All numbers less than or equal to 8
square root of x/pi
5x3=15 is the inverse
4x8 equals 32
First column, of x values, is the domain of x - whatever that may be. Second column, of function values is always 3.
Assuming the domain and range are both the real numbers (or rationals): Yes, it is 1 to 1 Yes, it is onto and the inverse is x = (y-3)/4
29
Assuming that b > 0, it is an inverse power function or an inverse exponential function.
All numbers less than or equal to 8
The inverse is not a function because it fails the vertical line test.
5
Give the domain for
log5x
Direct
square root of x/pi
Because the inverse of a function is what happens when you replace x with y and y with x.
The range depends on the domain, which is not specified.