Algebra I

"algebra" comes from the Arabic word al-jabr, which means "reunion of broken parts"

Variables

Don’t use multiplication sign

inequality sign flips when divide by -1

Inequalities

Slope = change y over change x

Slope = delta y over delta x

Slope-Intercept Form

y = mx + b

b is the y intercept and m is the slope

Point-Slope Form

(a, b)

y - b = m (x - a)

or

y-y1=m(x-x1)

Standard form

Ax + By = C

Shift absolute value graphs

inverse