The distance between any two points (x_1, y_1) and (x_2, y_2) is
[tex]d=\sqrt[]{\mleft(x_1-x_2\mright)^2+\mleft(y_2-y_1\mright)^2}[/tex]For our case, the above formula gives
[tex]d=\sqrt[]{(7+4_{})^2+(5-7_{})^2}[/tex]or if we go in reverse
[tex]d=\sqrt[]{(-4-7)^2+(7-5_{})^2}[/tex]which is the fourth choice.
