Which of the following is a linear function

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?

Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?

Iknow the answer but the calculator doesn't seem to give the right one