2. Writing “y = mx + b” Format Write the equation of the line between these two points: (3, 7) and (18, 6)
3. Writing y = mx + b Format (Cont.) Write the equation of the line between these two points: (3, 7) and (18, 6) First, find the slope (y2 – y1) ÷ (x2 – x1) (6 – 7) ÷ (18 – 3) (-1) ÷ (15) -1/15 Then find the y-intercept y = mx + b 7 = -1/15 × 3 + b 7 = -3/15 + b 108/15 = b
4. Writing y = mx + b Format (Cont. II) Write the equation of the line between these two points: (3, 7) and (18, 6) Finally, write in y = mx + b format y = -1/15x + 108/15
