lab report

Basically, Young's modulus is Stress/ Strain which is Force/Area * length/ extension. Young's modulus is the slope of the stress-strain graph.
Young's Modulus of the material is the stiffness of the material - how much force u need to add to deform that material.
A STIFF material has a high value of Young's Modulus. (It's harder to stretch the material)
A STRONG material has a high value of ultimate tensile stress - "breaking stress". (It means you need to apply a lot of force in order to make that material deform a little bit.)
And a WEAK material breaks at a lower stress.
BRITTLE material would be broken with no or very little amount of deformation.
TOUGH material would be broken before extensive deformation.

Hooke's law, before graph reaches the yield point, extension is proportional to force. (straight line part of the graph)
After the yield point, the internal structure of the material has changed, and the material won't return to the original shape.

You should plot Stress in the y-axis and Strain in the x-axis.
The shape of the graph really depends on what kind of material you were using in the experiment.
The graph should start from the origin. (The line you plot should go through the origin, theoretically)
If the line is straight, it means force is porportional to extension.
Area under graph = energy stored
Area between graph = energy transferred as internal energy (energy is used to increse temperature)

I hope that's what you need.