Find the domain, range, and zeros of the function? HELP

Hi Timothy,

When you are asked for the domain, you are to identify where a function exists with respect to the x-axis. As the x-axis is the horizontal axis (left to right), you would want to note the arrows on either end of the parabola. How far left and how far right would these extend? Sometimes we express the domain according to particular restrictions, but in this case you can simply say that the domain is a set. 

Likewise, the range is where the function exists with respect to the y-axis. As this is the vertical axis (up and down), you will want to identify if there is a lower or upper limit. Again, you will want to note the arrows. 

Finally, the zeros of a function are where the value of "y" is equal to zero. On a graph this is most easily found by finding where the graph of the function intersects the x-axis. There are two. 

Hope that is enough to help. If you need anything further, just ask :)