You calculate it by taking the change in y's over the change in x's. So (y1-y2)/(x1-x2). You get the equation (-5 - 3)/(5 - 7) which equals 4. 4 is the slope.
The answer is A. because if u were to use ur place value it would line up.
Y=2 7x2= 14
X= 7 4x7=28
28-14=14
