Use coordinate of the labeled point to find a point slope equation of the line (2,-1)

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

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.