Ask questions and get helpful responses.

math

A line has a gradient of 3 and passes through the point (-3,3). its y intercept is a)0 b)3 c)6 d)9 or e) 12

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. Recall the point-slope form:
    y - y1 = m(x - x1)
    where
    (x1, y1) = a point on the line
    m = slope or the gradient
    In the problem, we have a gradient or slope = 3, and point (-3,3) on the line.
    Substituting,
    y - 3 = 3(x - (-3))
    y - 3 = 3(x + 3)
    y = 3x + 9 + 3
    y = 3x + 12
    Note that this form is the slope-intercept form (y = mx + b).
    In the equation we got, the slope (m) is 3, and the y-intercept (b) is 12.

    Hope this helps~ :)

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. find the gradient which passes through (-1,5) and (3,-30

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Respond to this Question

First Name

Your Response

Still need help? You can ask a new question.