Is y=4(x-7)+6 a linear equation if so what is the answer to the ratio table

Eileen purchased 3.4 pounds of apples at the total cost of $19.72. if she purchases 6.2 pounds of apples at this store, how much would it cost?

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.