#### Answer

Practice 1 (Solution)
Since the slope and a point on the line are given, the point-slope form can be used, with m = –2 and (x1, y1) = (2, –4).
y – y1 = m (x – x1) Point-slope form
y – (–4) = –2 (x – 2) Substitute m = –2 and (x1, y1) = (2, –4)
y + 4 = –2x + 4 Using the distributive property
y = –2x
In slope-intercept form, the equation is y = –2x.