B) C=0.23m+34.99
because you get you base price definitely and extra minute price can be removed if you don't use more than 100
Slope 1/7 ; easiest way to remember is rise over run
change the 6 ito - 6 by turning to left side then you will have -3 -6 now you can add them (- + -) is + so you can add them the sign of 6 is greater so the answer is -9
Answer: B
Step-by-step explanation: