What’s 4y+1=9 I cant figure it out

The box plots show the average speeds, in miles per hour, for the race cars in two different races. which correctly describes the consistency of the speeds of the cars in the two races?

Complete this sentence with the best of choices given

Ana’s dachshund weighed 5 5/8 pounds when it was born . by age 4 the dog weighed 6 times as much. fill each box with a number or symbols from the list to show how to find the weight of ana’s dog at age 4 . not all numbers and symbols my be used