Math (Pre-Calculus)

posted by .

Find an equation of the line containing the points (8,-6) and (8, -4)

so far i've tried y-y1=m(x+x1) but currently cannot get the answer....T-T

the answer is suppose to be x=8

plz show the work so i can study form it and do it myself the next time... thnx in advance

  • Math (Pre-Calculus) -

    did you not notice that the slope is undefined?
    (slope = (-4 + 6)/(8-8) = 2/0)

    so you have a vertical line.
    All vertical lines are of the form x = ? , where the ? is simply the x coordinate of any point on the line
    Thus x = 8

    btw, a horizontal line would be of the form
    y = ? , where ? is the y coordinate of any point on the line , (all the y's would be the same).

    If you really insist on using your method, you could go ...

    y - (-6) = (2/0)(x - 8)

    then 0(y+6) = 2(x-8)
    0 = x-8
    x = 8
    but that is rather silly

  • Math (Pre-Calculus) -

    slope = m = (Y2-Y1)/(X2-X1) = (-4-8)/(8-8)
    Oh my, we have a problem, the slope is undefined because of zero denominator.
    The line with infinite slope goes straight up, constant x

    so the solution is
    x = 8

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. algebra

    Find an equation of the line having slope and containing the given point. M=4/5, (3, -7) The equation of the line is Y= I have tried to work this problem and could not get the answer. Please help me.
  2. MATH

    I had an assignment containing 45 problems, and I am unsure of 4, can you check and see if the answers are correct?
  3. Math

    I had an assignment containing 45 problems, and I am unsure of 4, can you check and see if the answers are correct?
  4. Math

    I had an assignment containing 45 problems, and I am unsure of 4, can you check and see if the answers are correct?
  5. Algebra

    graph the equation x-3=y (where do I plot the points?
  6. math 118

    a. Suppose a market research company finds that at a price of p = $6., they would sell x = 44 tiles each month. If they lower the price to p = $2, then more people would purchase the tile, and they can expect to sell x = 48 tiles in …
  7. calculus

    find an equation for the line with the given properties. express the equation in slope-intercept form. containing the pointsP=(-1,1)& Q= (1,-2) What is the equation of the line?
  8. Calculus

    Given the function y=(x^2-5/x+3), answer the following questions. a) Find dy/dx. Simplify your answer b) Find the coordinates of any points on the graph of y where the tangent line is horizontal. Show your work. c) Are there any points …
  9. calculus

    find an equation for the line with the given properties. express the equation in slope-intercept form containing the points. P=(-5,4) and Q=(-4,2) plz show work
  10. math plz help ;-;

    What is the equation of the line containing the two points (-4, 8) and (1, -7)?

More Similar Questions