Displacement against time-graph

Independent variable Dependent variable
X-axis y-axis

Time/s Displacement/m
0 20.0
1.0 28.0
2.0 33.0
3.0 45.0
4.0 47.0
5.0 55.0
6.0 63.0
7.0 68.0
8.0 76.0

a) Determine the gradient of the graph.
b) What is the displacement when the time is 2.8s?

Please draw it for me!

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