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Izan knows that Lines MN←→− and KL←→ are parallel to one another, and KOLO=MONO. Which of the following describes how Izan can prove that the slopes of MN←→− and KL←→ are the same?
A) Izan can use the slope formula to show the slope of MN←→−=−MONO and the slope of KL←→=−KOLO. By substitution, the slope of MN←→−=the slope of KL←→.
B) Izan can use the definition of parallel lines to show that since lines MN←→− and KL←→ are parallel, the slope of MN←→−=MONO and the slope of KL←→=KOLO. Thus, the slope of MN←→−=the slope of KL←→.
C) Izan can use the definition of similar triangles to show that the slope of MN←→−=NOMO and the slope of KL←→=LOKO. Thus, the slope of MN←→−=the slope of KL←→.
D) Izan can use the slope formula to show the slope of MN←→−=−KOLO and the slope of KL←→=−MONO. By substitution, the slope of MN←→−=the slope of KL←→.
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