Find a relationship between x and y such that (x,y) is equidistant from the two points.
(3,-2) and (-7, 1)
To solve this equation:
- Square both sides of the equation
- Use subtraction to get both of the y terms on one side and both of the x terms on the other
- Expand the squares and simplify
- Solve for y in terms of x
Check your answer against (-2, -0.5) -- the exact values, obtained by the midpoint formula --by plugging them into the resulting function.
You are correct. There is an alternative, simpler and easier way to do this btw:
1. Using midpoint formula, find the point that is equidistant between these two points is:
2. Find the slope of the two given points. (-3/10)
3. Take the negative reciprocal of the slope (10/3).
4. Plug in point-slope form (Use the negative reciprocal slope and the point we got from midpoint formula):
y - y1 = m(x - x1)
There, you got yourself the equation for a line that is perpendicular to the midpoint.
You could have used the construction of the perpendicular bisector to verify your answer. Working it two ways and getting the same answer is a great confidence builder. Too bad Chop Suey did it for you. You missed a great opportunity to explore and to learn. Don't let the next opportunity get by you.