type in your expression at wolframalpha.com
It will show the graph. Play around there a while.
sket the graph of each linear inequality y<-7/3x+4
2 answers
Yes, but the line should be dashed. I'm not sure how to make wolframalpha do that. Is there a way? Desmos.com does it nicely. Also, the thing to enter is probably y<(-7/3)x+4 (note parentheses)