Algebra help please

Jayda's house is located at (1, 5). she can walk in a straight line to get to cristian's house. a fast-food restaurant is located at (11, 0) and partitions the way from jayda's house to cristian's house by a ratio of 5: 1. find the coordinate of cristian's house. me . im a little stuck

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Which shows how to solve the equation 3/4x=6 for x in one step?