# Math Help - homework question Functions

1. ## homework question Functions

It asks to find the domain and range

f(x) = 3x + 5

2. Domain and range are both real numbers (or could be complex) giving $f:\mathbb{R}\to\mathbb{R}$

You should recognise this as the equation of a straight line.

3. so....

the domain is {x|x∈R}

and the range is {y|y ≤ 3, y∈R} ?

'cause I'm also having trouble with this.