The equation and the tables represent two different functions. Use the equation b=4a-5 and the table to answer the questions. This table represents c as a function of a.
A- -3 0 2 5 10 12
C- -20 7 3 21 19 45
1. When a is "-3," is b or c greater?
2. When c is 21, what is the value of a? What is the value of b that goes with this value of a?
3.When a is 6, is b or c greater?
4.For what values of a do we know that c is greater than b?