Question

you perform an experiment to measure the speed of a car over time. the data are shown in the table below.which graph shows the data from this experiment?

Explanation:

Step1: Analyze the trend of speed over time

From the table, as time increases (from \(0\) to \(25\) seconds), the speed of the car decreases. At \(t = 0\) s, \(v=30\) m/s; at \(t = 5\) s, \(v = 28\) m/s; at \(t=10\) s, \(v = 26\) m/s; at \(t = 15\) s, \(v=22\) m/s; at \(t=20\) s, \(v = 16\) m/s; at \(t=25\) s, \(v = 10\) m/s.

Step2: Check the graphs

• Graph A shows an increasing trend of speed with time, which is not consistent with the data (speed is decreasing in the table).
• Graph B shows a decreasing trend of speed with time (at least for the first few data - points and then a more complex trend, but the initial trend and the general direction of decreasing as time increases is in line with the table data).

Answer:

B.