Ch1 college algebra formulas

distance formula

d=√(x2-x1)² + (y2-y1)²

midpoint

(x1+x2 / 2 , y1+y2 / 2)

how do you find x intercepts

plug 0 in for y, then solve for x

how do you find y intercepts

plug 0 in for x, then solve for y

How do you algebraic tests for symmetry x-axis

replace the y with -y

How do you algebraic tests for symmetry y-axis

replace the x with -x

How do you algebraic tests for symmetry to the origin

replace the x with -x and y with -y

standard form of a circle

(x-h)² + (y-k)² = r²

slope intercept form

y=mx+b

finding slope

y2-y1 / x2-x1

point slope form

y-y1 = m(x-x1)

what makes a line parallel

if they have the same slope

what makes a line perpendicular

if the slop is the opposite and flipped from the original

how do you find average rate of change?

f(x2)-f(x1) / x2 - x1

what is the position equation?

s=-16t²+v0+s0