Answer
a)
1- $\rm\left(0\;s,0\;m\right)$
2- $\rm\left(2\;s,25\;m\right)$
3- $\rm\left(4\;s,90\;m\right)$
4- $\rm\left(6\;s,210\;m\right)$
5- $\rm\left(8\;s,400\;m\right)$
6- $\rm\left(10\;s,520\;m\right)$
7- $\rm\left(12\;s,600\;m\right)$
8- $\rm\left(14\;s,680\;m\right)$
9- $\rm\left(16\;s,730\;m\right)$
b) See the graph below.
Work Step by Step
a) We know that the camera takes a frame each to seconds. And we can see the position of the car every 2 seconds as well.
So, the points here are as follow:
1- $\rm\left(0\;s,0\;m\right)$
2- $\rm\left(2\;s,25\;m\right)$
3- $\rm\left(4\;s,90\;m\right)$
4- $\rm\left(6\;s,210\;m\right)$
5- $\rm\left(8\;s,400\;m\right)$
6- $\rm\left(10\;s,520\;m\right)$
7- $\rm\left(12\;s,600\;m\right)$
8- $\rm\left(14\;s,680\;m\right)$
9- $\rm\left(16\;s,730\;m\right)$
b) We just need to plug the dots onto the $t-x$ graph, as seen below.
