Which expression is equivalent to.NEED HELP ASAP PLSSS!!!

Describe all the numbers that when rounded to the nearest thousand are 645,000

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

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled