The equation y= 5.5x represent a proportional relationship, what is the constant proportionality

If m 17 27 90 63 ** picture is attached

How many solutions does the nonlinear system of equations graphed below have?

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.