A tube is 2.5 m long. It is cut into 1/4 m sections. How many pieces are there?

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

Which of the following tables represents exponential functions?

How can you tell when x and y are not directly proportional?