Which graph does not represent y as a function of x

Which graph shows a function with a range of all real numbers greater than or equal to -1

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28