Square abcd has the vertices a(-2,-3), b(4,-1), c(2,5), d(-4,3). what is the length of a side of the square?

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3