emath equations of the line

slope

measure of steepness

m=(y2-y1)/(x2-x1)

formula for slope

rise

vertical change

run

horizontal change

right to left

positive slop

left to right

negative slope

increasing

is positive slope decreasing or increasing?

decreasing

is negative slope decreasing or increasing?

delta

change

zero

horizontal

undefined

vertical

undefined, zero, positive, negative

when asked for the name

decreasing, increasing, horizontal, vertical

when asked for the descriptions