Question

Time (min)	Flexural Strength (kN)	Deflection (m).
15	0.2	0.0001
30	0.4359375	0.000226
45	0.7484375	0.00035
60	1.24025	0.000476
75	1.65625	0.0006
90	1.971875	0.000726
105	0.45	0.000852
120	0.165625	0.000978

1) Plot the graph of Flexural Strength vs Deflection.

Mortar (Density 1400) - Flexural Strength (kN) vs Deflection (m).

2) Energy of the concrete can be calculated by finding the area under the graph. Therefore, evaluate the energy of the concrete by using two (2) methods:

i. Portioning the area under the graph and manually calculate the area of each portion.

ii. From the graph, add a trendline of polynomial to get an approxiamate function and integrate the function to get the area under the graph.

3) Compare and justify the value from both methods

Answer 1