Could someone answer these 3 questions?

Which of the following circles have their centers in the third quadrant?

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2

Find the slope intercept form of (-3,6) and (3,-6)