1.

If L is a line through (-1,3) and (4,2), for what value of k is (3,k) on L?

Answer»

-2
0
2.2
2.5

Solution :The SLOPE of the LINE is `(2-3)/(4-(-1))=-(1)/(5)`. Therefore, `(K-2)/(3-4)=-(1)/(5)`. Cross-multiplying yields 5k-10=1, so k`=(11)/(5)=2.2`. [2]


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