Raj is deciding between two cell phone plans, A and B, which are both linear functions. The monthly charge for plan A according to the number of minutes used is shown in the table. Monthly Charge for Plan A Minutes used, x Monthly charge dollars , y 0 14 point 4 5 3 14 point 8 4 6 15 point 2 3 9 15 point 6 2 12 16 point 0 1 Plan B has the same monthly base charge as plan A, but it charges a different amount per minute used. If the total monthly charge for plan B is 22 dollars 10 when 45 minutes are used, what is the slope of the linear function that represents the cost of plan B?