Equation A find “m” and “b”: “B” is the y-intercept when x = 0. They give this in the table as “-2” so b = -2 Find slope (m) = (-8)-(-2)/(-2)-0 = 3 Equation A is y = 3x - 2 (y = mx + b) Equation B find “m” and “b”: Find m = (-9)-(-5)/(-3)-(-1) = 2 To find be, plug in m, x, and y from ANY coordinates in table b into y = mx + b: -9 = 2(-3) + b -9 = -6 + b b = -3 Equation b is y = 2x -3 Use substitution and substitute all of equation “b” for “y” in equation a: 2x - 3 = 3x - 2 Algebra: x = -1 Plug back into equation a: y = 3(-1) -2 y = -5 x = -1 (-1, -5) final answer (B)
