A spring was tested in Chicago last Thursday. The test of the spring, X-19, produced the following data:
 FIGURE 1.png)
(a) Plot the data on rectangular graph paper and determine the equation that expresses the deflection to be expected under a given load. Use both the method of selected points and computer-assisted methods.
(b) Predict the load required to produce a deflection of 75 mm.
(c) What load would be expected to produce a deflection of 120 mm?
 ANSWER.png)
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