Question

A student finds the slope of the line between (8, 17) and (1, 4). She writes[tex]17-4/1-8 What mistake did she make? A. She used y-values where she should have used x values. B. She mixed up the x- and y values. C. She did not keep the order of the points the same in the numerator and the denominator. D. She should have added the values, not subtracted them.

Answer 1

C

Explanation:

Calculate the slope m using the slope formula

m =
`(y_(2)-y_(1) )/(x_(2)-x_(1) )`

with (x₁, y₁ ) = (1, 4) and (x₂, y₂ ) = (8, 17)

m =
`(17-4)/(8-1)` =
`(13)/(7)`

Instead of 8 - 1 on the denominator she had 1 - 8

She did not keep the order of the points the same in the numerator and the denominator.