What is the midpoint of EC ?

A: (t + p, r)

B: (p – t, r)

C: (2p – 2t, r)

D: (p, r)

Given:

Given that the graph OACE.

The coordinates of the vertices OACE are O(0,0), A(2m, 2n), C(2p, 2r) and E(2t, 0)

We need to determine the midpoint of EC.

Midpoint of EC:

The midpoint of EC can be determined using the formula,

Substituting the coordinates E(2t,0) and C(2p, 2r), we get;

Simplifying, we get;

Dividing, we get;

Thus, the midpoint of EC is (t + p, r)

Hence, Option A is the correct answer.

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step-by-step explanation:

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