Is it irrational or rational that goes in each drop down menu

Which statement justifies why angle ebc measures 90?

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?