Does the table below represent a proportional relationship?
x 1 2 3 4
y 3 6 9 12
A.
No, because all the ratios of y to x are not equal.
B.
No, because all the numbers are positive.
C.
Yes, because all the ratios of y to x are equal to 3.
D.
Yes, because all the ratios of y to x are equal to 2.
Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account. write an expression to represent the total amount in his savings account.