How to show the ratio 3: 8 is equal to 12: 32

Me because some of question i don’t understand

Consider the functions below. function 1 function 2 function 3 select the statement which is true about the functions over the interval [1, 2] a b function 3 has the highest average rate of change function 2 and function 3 have the same average rate of change. function and function 3 have the same average rate of change function 2 has the lowest average rate of change d.

3c2 + 2d)(–5c2 + d) select all of the partial products for the multiplication problem above.