4 Example 2Write an equation of the line that passes through the points (4, -2) and (-2, 2)
5 Example 3Write the equation of the line that passes through the point (-4, -9) and has a slope of 2.
6 Graphing a Linear Equation Step 1: Rewrite the equation in slope-intercept form (if necessary).Step 2: Identify the slope and y-interceptStep 3: Plot the y-interceptStep 4: Use the slope to plot a second point and then draw a line through the two points.It is optional, but highly recommended to draw more than two points to graph a linear equation
7 Example 4 & 5Identify the slope and y-intercept of the line with the given equations and then graph the equations.4) ) 4x – 3y = 15
8 Example 6Write an equation for the linear function f with the given valuesf(6) = -4, f(9) = -9
9 Two lines in the same plane are parallel if they do not intersect. Parallel lines have the same slope.Two lines in the same plane are perpendicular if they intersect to form a right angle.Perpendicular lines have slopes that are opposite reciprocals.
10 Example 7Tell whether the following graphs are parallel, perpendicular, or neither.y = 2x + 44x + 2y = 12
11 Example 8Tell whether the following graphs are parallel, perpendicular, or neither.3x + 4y = 24-4x + 3y = 20