Some students in a school were surveyed to determine how many hours they study per night and their grade-point averages. the results are shown in the table. if the data are entered into a regression calculator, what is the approximate y-intercept of the resulting regression line? –1.76 –0.63 0.63 1.76

Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers