Graph more than one point, especially when it's
easy! On 44, by only graphing one point (the maximum, at
(1,3)), you don't show the scaling (the impact of the "2"
multiplying the term )
Don't forget to label your graphs, to indicate scale particularly.
Check your graphs by actually graphing them with a calculator.
On 45 and 55, change the name of the function (don't reuse
f). You're creating a new function -- give it a new
name!