Please help!! I'm super confused

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

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

X– 4 = 12.5 can be written in words as