Rdivided by n plus t equals four v times n

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter