Which number is a rational number?

13/16 sqrt
34 sqrt
49 sqrt
9/2 sqrt

The quadratic function h(t) = -16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after its dropped from a 15 story building. from what height in feet was the ball dropped?

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

Which of these tables represents a non-linear function?