**linear functions**: has the form of *f(x) = ax + b *(a & b are constants)

**constant functions: **has the form *y = c* (c is a real number)

**identity functions: **has the form *y = x* (a linear function where the slope (*m) *(or *(a) *)* *= 1 & the y-intercept *(b)* = 0)

**slope of a line**: “rise over run” *m = (y2 – y1) ÷ (x2 – x1)*

**slope-intercept form: ***y = mx + b *(where *m* is the slope & *b* is the y-intercept)

**rate of change: **equals the slope of the function, if it is linear

two lines are parallel if they have the same slope

two (nonvertical & nonhorizontal) lines are perpendicular if their slopes are negative reciprocals of each other

Advertisements

## Leave a Reply