Chang stepped onto an escalator moving at a constant rate. The table below shows his distance from the first floor after different amounts of time.
Time (seconds) 6 9 12 15
Distance (centimeters) 1020 900 780 660
Answer the following questions.
(a) What was Chang's distance from the first floor when he stepped onto the escalator?
(b) Choose the statement that best describes how the time and his distance from the first floor are related. Then
give the value requested.
As time increases, his distance from the
first floor decreases.
At what rate is his distance from the first
floor decreasing?
centimeters per second
As time increases, his distance from the
first floor increases.
At what rate is his distance from the first
floor increasing?
centimeters per second