Which graph represents a proportional relationship between x and y?​

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Which of the following is true for the relation f(x)=2x^2+1