What is the inverse of the function (x) = 1\4 x -12

With #! i’ve tried to figure it out but i can’t.

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?