Question

A line intersects the points (-23, -17) and (-13, -7). Find the slope of the line.

Answer 1

The slope of a line through points
`A(x_1, y_1)` and
`B(x_2, y_2)` is :


`\displaystyle{ (y_2-y_1)/(x_2-x_1)`

or


`\displaystyle{ (y_1-y_2)/(x_1-x_2)`,

it is the same thing, BUT it it always y's over x's and always in the same order of 1 and 2:

don't write:
`\displaystyle{ (y_1-y_2)/(x_2-x_1)`

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The slope of the line through the points (-23, -17) and (-13, -7) is :


`\displaystyle{ (-17-(-7))/(-23-(-13))= (-17+7)/(-23+13)= (-10)/(-10)=1`


Answer: 1