Me on this! offering 15 points to who if you need a close up on the question just ask me

Since the question doesn't state whether he wants his students to make the figure larger or smaller we can just find both.

Multiply by 3 to make the sides larger.

2 * 3 = 6 inches

3.1 * 3 = 9.3 inches

4.5 * 3 = 13.5 inches

3.9 * 3 = 11.7 inches

Divide by 3 to make the sides smaller.

2 / 3 = 0.66... inches

3.1 / 3 = 1.033... inches

4.5 / 3 = 1.5 inches

3.9 / 3 = 1.3 inches

Mark said 5 inches, so, he is incorrect.

Samantha said 6 inches, so, she is correct.

Divia said 1.3 inches, so, she is correct.

Cheng said 0.9 inches, so, he/she is incorrect.

Candice said 11.7 inches, so, she is correct.

Best of Luck!

is means division by fractions

step-by-step explanation: