Which inequality shows the region represented by the inequality in vertex form?

y greater-than-or-equal-to (x minus 50) squared + 625
y greater-than-or-equal-to negative (x + 50) squared + 625
y greater-than-or-equal-to (x + 50) squared + 625
y greater-than-or-equal-to negative (x minus 50) squared + 625