Michigan State University - Diagnostic Exam

 [next]  [prev]  [bottom]  [up] 

2.19

  •   What is the equation of the line that is parallel to the line y - 5x = 2 and has the same y-intercept as the line 7x- 3y = 21?



    a) y + 5x = 2 b) y + 5x = 3 c) y = 5x - 7
       
    d) y = 5x + 7 e) y = -5x + 3

Solution:

7(0) - 3y = 21  ⇒  y = -7. Also, y - 5x = 2  ⇒  y = 5x + 2  ⇒  slope = 5. It follows that the equation is y = 5x - 7.

Diagnostic:

If you miss this question please review parallel lines.

See 2.18: Lines in the Plane (Intercepts) .

 [next]  [prev]  [top]  [up] 

July 15, 2008