Can any girl help me with my wood situation ?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32