Pleeeaassseee help im so confused

Amarathon runner jogging at a constant speed for 45 minutes is it proportional to time or not

Adaylily farm sells a portion of their daylilies and allows a portion to grow and divide. the recursive formula an=1.5(an-1)-100 represents the number of daylilies, a, after n years. after the fifth year, the farmers estimate they have 2225 daylilies. how many daylilies were on the farm after the first year?

Can you me find the missing length. i attached an image.