Find two numbers whose sum is 20 and difference is 1

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Which graph represents the equation y =4x

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