Please help! Explanation and Answer please!

The long jump record, in feet, at a particular school can be modeled by f(x) = 19.6 + 2.5ln(x + 1) where x is the number of years since records began to be kept at the school. what is the record for the long jump 11 years after record started being kept? round your answer to the nearest tenth.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

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