The diagonals of a rhombus are perpendicular bisectors of each other. You can use the Pythagorean theorem. If the diagonals are length "a" and "b", the side length of the rhombus (s) is
s = (1/2)√(a²+b²)
The y intercept = -4
Also, the slope of the line (if needed) is -2.
I think this is
4+3 = 7.
.. :))
