Basic Pre-Algebra Facts/Formulas

average rate of change

ƒ(B) - ƒ(A) / B-A

slope

m=y₂-y₁/x₂-x₁

slope easy formula

- a/b

y intercept easy formula

c/b

x intercept easy formula

c/a

negative slope

positive slope

zero slope

no slope - undefined

slope defenition

Constant rate of change: change in y over change in x

y-intercept definition

where graph crosses y axis

point slope form

y - y₁ = m(x - x₁)

standard form

Ax + By = C where A, B, and C are all constants and A and B are not zero.