Determine whether the relation is a function. {(-9,-6), (-9,8), (-1,7), (4,5), (8,-9)}

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

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

If f (x) = 2x2 +5/(x-2), complete the following statement: f(6) =