Question

How do you find the domain and range of `y = 2x - 1`?

Answer 1

Domain: `(-oo, +oo)`
Range: `(-oo, + oo)`

Explanation:

Your function has no restrictions for its domain, since it's defined for all `x in RR`.

Its domain will thus be `(-oo, + oo)`.

The same can be said for its range. Your function can take any avalue of `x` and produce any value of `y in RR`, so its range will be `(-oo, + oo)`.

graph{2x-1 [-10, 10, -5, 5]}