Which expression can you use to find the slope of the line containing the points -3, 2 and 7 , -1

Use the formula y1-y2/ x1-x2. 2+1/-3-7= 3/-10

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.