Functions and Graphs

Linear Graphs

• Straight line graph represented by equation in the form y = mx + c
• Slope (m) determines steepness of line
• y-intercept (c) is the y-coordinate where the line crosses the y-axis

Coordinate Geometry

• Use (x, y) coordinates to describe position on a coordinate plane
• Find midpoint of two points using formula: ((x1 + x2)/2, (y1 + y2)/2)
• Calculate distance between two points using formula: √[(x2 - x1)^2 + (y2 - y1)^2]
• Determine equation of a line given two points or point and slope