(x, y)

Chapter Summary
MathGV - Graphing Program

Distance between P and Q is given by d:

Midpoint between P and Q is given by the coordinates:

Equation of Vertical line is x = a
Equation of Horizontal line is y = a

For points: P(x₁ , y₁) and Q(x₂ , y₂)

For 2 lines with slopes  :

Slope  if line is a horizontal line

Slope  is undefined if line is a vertical line

Slope  if both lines are parallel

Slope  if lines are perpendicular

Point-Slope form: 

Slope-intercept form: 

(a) y-intercept: value of y when x = 0

(b) x-intercept(s); values of x when y = 0

Symmetry:

(a) About the y-axis if 

(b) About the origin is 

Equation of a Circle:

(a)  , where center is (0, 0)

(b)  , where center is (h, k)

Inversely Proportional:

Joint Proportional:

Combine