A function is defined as shown f(2)=-4x^2 +5x - 2 What is the average rate of change of f(2) over the interval 1 ​

How to do this , and can some one explain

Write an equation in slope intercept form of the line passes through the given point and is parallel to the graph of the given equation (0,0); y=3/8 x+2

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)