diff --git a/search.py b/search.py
index c3f128c..04c7815 100644
--- a/search.py
+++ b/search.py
@@ -2,6 +2,7 @@
 import math
 
 class NotFoundError(Exception):
+    """Custom exception raised when an element is not found in a search."""
     pass
 
 
@@ -21,15 +22,40 @@ class Search:
     # LINEAR SEARCH
     # =====================
     @staticmethod
-    def linear(data: List[Any], target: Any, comparator: Callable[[Any, Any], bool]) -> Any:
+    def linear(data: List[Any], target: Any, comparator: Callable[[Any, Any], bool]) -> int:
         """
         Performs a linear search through the list.
-        Returns the index of the target, or -1 if not found.
+
+        Iterates through the list using a custom comparator function to find the target.
+        Returns the index of the first found element.
+
+        Args:
+            data: A list of elements to search through.
+            target: The element to find.
+            comparator: A function that takes two elements (list_element, target)
+                        and returns True if they match.
+
+        Returns:
+            int: The index of the first found element.
+
+        Raises:
+            NotFoundError: If the target is not found in the list.
         """
-        pass
+        # Linear search iterates through the list, checking each element sequentially.
+        # This handles the complexity requirements (O(n) worst case, O(1) best case).
+        for index, element in enumerate(data):
+            # Use the custom comparator function as required by the assignment
+            # The comparator checks if the current list element matches the target
+            if comparator(element, target):
+                # Return the index immediately upon the first match.
+                return index
+
+        # If the loop completes without finding a match (this handles empty lists as well),
+        # raise the custom NotFoundError exception with the descriptive message.
+        raise NotFoundError(f"{target} was not found")
 
     # =====================
-    # BINARY SEARCH
+    # BINARY SEARCH (Implementation left as 'pass' as per your original code)
     # =====================
     @staticmethod
     def binary(data: List[Any], target: Any, comparator: Callable[[Any, Any], int]) -> Any:
@@ -42,5 +68,4 @@ def binary(data: List[Any], target: Any, comparator: Callable[[Any, Any], int])
             - positive if a > b
         Returns the index of the found element, or -1 if not found.
         """
-        pass
-
+        pass
\ No newline at end of file