11

 PAGE: 241 SET: Exercises PROBLEM: 11

The line equation in slope-intercept form is , where m is the slope and b is the y-intercept.

Compare the equation with slope-intercept form and find the slope of the line.

Slope of the line .

Find the parallel line equation, substitute  and in the point-slope form equation .

Subtract 2 from each side.

If two lines are perpendicular, the slope () of one line is opposite

reciprocal of the second line slope (). It can be represented as, .

So, slope of the line perpendicular to given line is .

Substitute  = and in the point-slope form .

The slope-intercept form in parallel line equation is .

The slope-intercept form in perpendicular line equation is .

TESTIMONIALS
 "I want to tell you that our students did well on the math exam and showed a marked improvement that, in my estimation, reflected the professional development the faculty received from you. THANK YOU!!!" June Barnett "Your site is amazing! It helped me get through Algebra." Charles "My daughter uses it to supplement her Algebra 1 school work. She finds it very helpful." Dan Pease
 Tweets by @mathskeydotcom

QUESTIONS? LET US HELP.