diff --git a/cachematrix.R b/cachematrix.R
index a50be65aa44..76114ae985b 100644
--- a/cachematrix.R
+++ b/cachematrix.R
@@ -1,15 +1,45 @@
-## Put comments here that give an overall description of what your
-## functions do
+## SUMMARY. The following functions solve the inverse of a given matrix,
+## store the cached inverse, and retrieve the cached inverse. If the inverse
+## of a matrix has not yet been solved for, the function will solve for the
+## inverse. If the inverse has already been solved for, the solved inverse
+## is saved so that it can be retrieved in the future instead of recomputed.
+
+## makeCacheMatrix takes the argument of a matrix and returns a list with 4
+## items: setting the value of a matrix, getting the value of a matrix, 
+## setting the value of the solved matrix, getting the value of the solved
+## matrix. 
 
-## Write a short comment describing this function
 
-makeCacheMatrix <- function(x = matrix()) {
 
+makeCacheMatrix <- function(x = matrix()) {
+  i <- NULL
+  set <- function(y) {
+    x <<- y
+    i <<- NULL
+  }
+  get <- function() x
+  setinverse <- function(solve) i <<- solve
+  getinverse <- function() i
+  list(set = set, get = get,
+       setinverse = setinverse,
+       getinverse = getinverse)
 }
 
 
-## Write a short comment describing this function
+## cacheSolve solves for the inverse of a matrix using the vector that
+## makeCacheMatrix outputs. First, cacheSolve checks to see if the inverse
+## has already been solved and retrieves the solved inverse.If the inverse 
+## has not yet been solved for, the function solves for the inverse.
 
 cacheSolve <- function(x, ...) {
         ## Return a matrix that is the inverse of 'x'
-}
+  i <- x$getinverse()
+  if(!is.null(i)) {
+    message("getting cached data")
+    return(i)
+  }
+  data <- x$get()
+  i <- solve(data, ...)
+  x$setinverse(i)
+  i
+}
\ No newline at end of file