midpoint between two points, you can use the midpoint formula:
m = (x1 + x2)/2, (y1 + y2)/2
Where m is the midpoint, and (x1, y1) and (x2, y2) are the coordinates of the two points.
In this case, the coordinates of point e are unknown, but we are given the coordinates of points a and c. To find the coordinates of point e, we can use the midpoint formula with a and c as the two points. Plugging in the coordinates of a and c, we get:
e = ((-3a + (-a))/2, (b + (-5b))/2)
Simplifying, we get:
e = (-2a/2, -2b/2)
Simplifying further, we get:
e = (-a, -b)
So the coordinates of point e are (-a, -b).
I hope this helps