Which graph most closely models the data in the table

If myesha works overtime, she gets paid "time and a half" for every hour she works. in other words, for every hour over 40 hours myesha works each week, she gets her hourly pay plus half her hourly pay. what is myesha's pay per hour when she works overtime?

Write the function for the graph. (1.8) (0,4)

The area of a circle is equal to 1 dm². find the radius of the circle.