Last month, louisa performed an experiment to study how springs are stretched by weights. she recorded the data carefully and
found that a straight line fit the data very closely. this agreed what louisa had read in her textbook. this week, louisa tried to
aline to perform a similar experiment. this time, the graph of the data seemed to bend into a curve at the upper end.
what might the girls conclude, based on this second experiment?
a)louisa must have done something wrong the first time.
b)the spring louisa used in one of the experiments was defective
c)the fact that a straight line does not fit the new data proves them wrong.
d)louisa should review the results or repeat the experiment to explain the
difference.