What is the constant rate of change??

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Secant ac and bd intersect at point e inside f what is the measure of aed if measurements cd equals 30 a b is 50 and cb is 170

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.