These tables represent an exponential function. find the average rate of change for the interval from x=9 to x=10

Me figure out the process to determine x you appreciate it : )

Which of the following points is collinear with (-2,1) and (0,3)

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is