The underground water pipe between two streets is damaged. Half the length of the pipe needs to be changed. The layout of the pipes on a coordinate grid shows one end point of the pipe at (-6, 1) and its midpoint at (-2, 3). Troy performed the steps shown to find the coordinates of the other endpoint of the pipe.

Question

anonymous · Answer

In which step did Troy first make an error?
Answer
		Step 2, because he used the incorrect formula to find the midpoint.
		Step 3, because he substituted the incorrect values in the formula.
		Step 4, because he found the product of -2 and 2 to be 4 instead of -4.
		Step 5, because he found the difference of 6 and 1 to be 5 instead of -5.