Which of these are linear? Choose ALL that apply. Please help I got 20 minutes

Thank you to all

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?

Factor the expression using gcf 9b+45

100 points? me its important ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️