A credit of $35 and a debit of $40 are applied to your bank account. a. What is an appropriate scale to graph a credit of $35 and a debit of $40? Explain your reasoning.
b. What integer represents "a credit of $35" if zero represents the original balance? Explain.
c. What integer describes "a debit of $40" if zero represents the original balance? Explain.
d. Based on your scale, describe the location of both integers on the number line.
e. What does zero represent in this situation?

Why do you say a credit is a negative if talking about MY bank account?