What is the constant of proportionality for the relationship modeled by the equation y=0.2xy=0.2x

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.

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

Average acceleration: i have no idea how to do this.