What error did Clyde make? And what is the correct simplified form

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?