Video Transcript
The table shows the distances three
toy cars move each second. Which of the markers on the graph
shows the motion of the car that is recorded in the table? Is it (A) the blue cross, (B) the
red cross, or (C) the green dot?
Here, we have a graph that has
three sets of symbols, each representing one set of data on the graph. The question asks us to pick out
the symbol that matches the data in the table. To do so, let’s start at the
origin.
We see that the first data point is
at the origin, which corresponds to a time of zero seconds and a distance of zero
meters. However, all three symbols have a
point there, so we cannot use this point to differentiate between them. Moving to the next data point, we
see that this lines up with one second on the horizontal axis and two meters on the
vertical axis. This matches the blue cross
symbol.
To be absolutely certain we’ve got
the right symbol, we can reverse this process and pick a blue cross on the
graph. We can then see if this corresponds
with a data point in the table. For our purposes, we can choose the
highest blue cross. We see it lines up with four
seconds on the horizontal axis and eight meters on the vertical axis.
When we check this against the data
table, we see that they match up. Therefore, the answer must be
option (A), the blue cross.
