Write the equation of the line and draw the graph of the line through each pair of points given. Use either the slope-intercept equation or by using x- and y-intercepts.

1. (4, 6) and (-1, 2)
2. (3, 5) and (3, 8)
3. (5, 6) and (2, 6)
4. (2, -1) and (0, 4)

Question

Write the equation of the line and draw the graph of the line through each pair of points given.  Use either the slope-intercept equation or by using x- and y-intercepts.

1. (4, 6) and (-1, 2)
2. (3, 5) and (3, 8)
3. (5, 6) and (2, 6)
4. (2, -1) and (0, 4)

phi · Answer

Write the equation of the line
Given 2 points  (4,6) and (-1,2) can you find the slope m?   (Change in y over change in x)
then use y- y_value= m(x - x_value)
What do you get for the first pair?

anonymous · Answer

so 4/-1?

phi · Answer

If you do not understand this, maybe this helps http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/v/equation-of-a-line-1

anonymous · Answer

can you give me the answer so i can figure out how i got it?

phi · Answer

slope from this pair (4,6) and (-1,2) 

y1 - y2  =   6 - 2 =4
x1 - x2  = 4 - -1 = 4+1 =5
and m= (y1-y2)/(x1-x2)= 4/5

anonymous · Answer

how would I graph this?

precal · Answer

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