Algebra

find the slope of the line that passes through (-2,1), (1,10).
A: 3
B: -3
C: 1/3
D: -1/3

Which equation represents a direct variation? What is the constant of variation?
A: 3y=2x+1;1
B: y=-5x-11;5
C: 4y=-12x;-3
D: y+7=2x-1;7

Suppose y varies directly with x, and y=12 when x=-3. what is the value of y when x=6?

A: -24
B: 2
C: -2
D: -4

  1. 👍 0
  2. 👎 0
  3. 👁 108
asked by ~Rose~
  1. the slope is (1-10)/(-2-1) = ?

    direct variation is y = kx
    so, which choice looks like that?

    y = kx, so y/x = k, a constant value. So, you want y such that
    y/6 = 12/-3

    1. 👍 0
    2. 👎 0
    posted by oobleck
  2. What is the equation of the line that passes through the points (0,4) and (3,-2)?


    What is the equation of the line through (5,1) with a slope of -3?

    1. 👍 0
    2. 👎 0
    posted by ~Rose~
  3. review two-point and point-slope forms.
    The 2-point is just like point-slope, but you have the extra step of finding the slope first.

    The slope of the line through (0,4) and (3,-2) is (-2-4)/(3-0) = -2
    So, now you have a point and a slope. The line is thus
    y-4 = -2(x-0)
    or
    y+2 = -2(x-3)
    Those both describe the same line.

    Now use the point-slope form on the other line

    1. 👍 0
    2. 👎 0
    posted by oobleck

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math 101

    Find the equation for each of the following items below: a. A line that passes through (6,26) and has a slope of 3. b. A line that passes though the points (5,5) and (10,20) c. A line that passes through (9,25) and has a slope of

    asked by SEMA , Need Help on March 23, 2010
  2. Algebra

    Hey, can someone help me out with these questions? 1. Find the slope of the line that passes through (-2,-3) and (1,1). A) 1/3 B) 1 C) 2 D) 4/3 2. A line with slope = 1/2 passes through the points (2,5) and (x,3). What is the

    asked by Izzybelle on November 18, 2018
  3. math

    i have more than one question so if u no any of the answers please tell me 1.) write the point-slope form of the equation of the line with slope -2 passing through the point ( -5, -9). 2.) write the point-slope form of an equation

    asked by becca on May 17, 2010
  4. Math/Algebra do u know how to do slope intercept?

    The following problems are in slope,point slope, and slope intercept forms of a line. Could you check these thanks. Find the slope intercept form of a line that passes through these two points (-4,4) and (2,1) Answer: y= -1/2x-2

    asked by Chico on March 26, 2009
  5. Algebra

    Please Check My Anwsers What is the slope of the line in the graph show below? /content/media/390571-1122011-42500-PM-1076804072.png A) -2 B) -1 C) 1 (My Choice) D) 2 Find the slope of a line that passes through (–2, –3) and

    asked by Anoamis =D on December 5, 2016
  6. Math

    What is the y-intercept of y = 2/3x + 2? I have to write it out but how? A line has a slope of 1/2 and passes through the point (0,5). What is the equation of the line? A)y = 1/2x + 5 B)y = 1/2x - 5

    asked by Walt on January 15, 2016
  7. Math please.

    What is the y-intercept of y = 2/3x + 2? I have to write it out but how? A line has a slope of 1/2 and passes through the point (0,5). What is the equation of the line? A)y = 1/2x + 5 B)y = 1/2x - 5

    asked by Walt on January 15, 2016
  8. mat 101

    Equation for a line that passes through (6,26) and has a slope of 3 Equation for a line that passes through the points (5,5) and (10,20) Equation for a line that passes through (9,25) and has a slope of -3. Equation for a line

    asked by keith on June 26, 2010
  9. geometry

    I would love for someone to check my work on the seven problems that I did. I would be eternally grateful. I am going to list my problems and answers. Even if you only want to check one of them, that would be great. 1. Write an

    asked by Savannah on August 2, 2015
  10. Math

    1. Find the slope of the line that passes through the points (-1, 2), (0, 5). 2. Suppose y varies directly with x, and y = 15 and x = 5. Write a direct variation equation that relates x and y. What is the value of y when x = 9? 3.

    asked by PicturesDon'tChangeThePeopleInsideOfThemDo on December 13, 2017
  11. Algebra 1 help

    Can someone tell me if my answers are right and explain how you got each one thank you very much ! 1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)? A. -3 B. -2 C. -1/3 ** D. 1/3 2. A line has a

    asked by 9thgradestudent on December 9, 2015

More Similar Questions