Topic explanation

Standard explanation

Point-slope form y-y1=m(x-x1) is safest when one point and slope are known.

Key points

• Equation of a line
• rule
• worked example
• Equation of a line: Point-slope form y-y1=m(x-x1) is safest when one point and slope are known.
• CONCEPT AND RULE: Point-slope form y-y1=m(x-x1) is safest when one point and slope are known.
• METHOD: For equation of a line, identify the given information and required result. Select the matching defi
• Point-slope form y-y1=m(x-x1) is safest when one point and slope are known.
• Worked pattern: Slope 3 through (2,-1): y+1=3(x-2).

Labelled diagram