Question

How do you find the domain and range of `y=2/5{{x-2}}`?

Answer 1

See below

Explanation:

I don't know why there are double braces in the expression, because they are not necessary.

`y = 2/5x - 4/5`

This is just a linear function, so its domain and range are all of `RR`

Domain`-> {x in RR}`

Range`-> { y in RR}`

All continuous linear functions have domain and range `RR` unless the gradient is `0` or undefined .i.e. perpendicular to the `x` axis.