Question

The points represented by the (x,y) coordinate pairs in the table below all lie on line k. What is the slope of line k?
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Answer 1

Answer:

the slope is -2/1

You can find it by using the equation $\frac{y_{1}- y_{2} }{x_{1}- x_{2} }$

so 3-1/1-2= 2/-1, which is also written as -2/1