The ones with ✓ signs are irrational the rest are rational. note this is not generally true but it is for this particular set
Answer:
Half of the base multiple by the height
It is 9x b because of a weird question
Answer:
I think it's -6. I have no idea
Only graph 5 is a function because if you do the vertical line test, you draw a vertical line anywhere on the graph. If the parabola crossed the line twice it would not be a function.
