Area is all x - values and reach is all y - values. See the entirety of the x qualities and y esteems that are contacting the diagram. Likewise, when there is a circle use enclosure for the stretch documentation
Domain is all x-values and range is all y values. See all of the x values and y values that are touching the graph. Also, when there is a circle/ hole, use parenthesis for the interval notation. Hope it helps!
.