Question

Domain, range, and is it a function? SCREENSHOT BELOW!

Answer 1

• Domain:
  `(-\infty, \infty)`
• Range:
  `(-\infty, 3]`
• Function: yes

Explanation:

Domain is the set of x values, range is the set of y values.

For it to be a function, each value of x must map onto no more than one value of y.