Quadrilateral RSTU has vertices at RS T  ( 1,11) , (9,12) , (13, 5)     and U (2, 2)  . (a) Show that the diagonals of RSTU are perpendicular.

(b) Show that RS ST  .

(c) Given that RSTU is a quadrilateral with perpendicular

diagonals and two adjacent, congruent sides, why isn't RSTU a

rhombus?

I'm gonna have to say about 13 percent

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!