tim's current bank balance is $75. he adds a charge of -$31 when he buys lunch for him and his friend. write and expression and use a model to determine tim's bank account balance now.

75-31, is an expression that model tim's current bank account

44 dollars is his current balance)

histogram or dot plot?

step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).