write an equation for the line described: a line whose
slope =3 and passes through the point (-2,7)
The point-slope formula
y - y1 = m[x - x1]
gives the equation of the line with slope = m which
passes through the point (x1,y1)
So plug in 3 for m, -2 for x1,
and 7 for y1:
y - 7 = 3[x - (-2)]
y - 7 = 3[x + 2]
y - 7 = 3x + 6
y = 3x + 13
Edwin