Question

a student finds the slope of a line between (14,1) and (18,17). she writes 1-17/18-14 what mistake did she make?

Answer 1

she substract 18 from 14 she supposed to subtract 14 from 18

Answer 2

Mistake was in denominator.

Explanation:

If a line passes through two points ( a, b ) & ( c, d )

Then slope of this line will be =
`((d-b)/(c-a))`

Now we come to the question.

a student finds the slope of a line passing through ( 14, 1 ) and ( 18, 17 ) as

slope =
`((1 - 17)/(18-14))`

This formula is not the form of
`((d-b)/(c-a))`

Accurate answer should be

slope =
`((1-17)/(14-18))`

So mistake was in denominator.