4 5 pts I have developed a regression model for sales using price as the predictor. But I have new data that suggests consumer behavior may be different from first quarter to second to third to forth. How many variables must I add to my regression equation? Describe these variables.

Based on calculations, students should have 10.4 grams of powder after conducting an experiment. the students get these results: 10.2 grams, 10.4 grams, 10.3 grams, 10.4 grams, and 10.5 grams. which words best describe this data? check all that apply. a- accurate b- falsified c-invalid d-precise e-redundant