16) Find the slope of the line. Assume that the scale on each axis is 1 unit per tick mark.

17) Find the x- and y-intercepts of the line represented by the equation below. Plot both intercepts on a coordinate system and draw the line through them.

2x - 3y = 6

18) Write the slope-intercept form of the equation of the line through the given points.

through: (1, -1) and (-5, -5)

19) Find at least three ordered pairs that satisfy the equation and sketch the graph of the line through them.

5x = 12 + 4y

20) Solve the system of equations by the method of substitution.

y = -3x

-5x - 2y = -1