Question

Write an equation for the line in point/slope form and slope/intercept form that has the given condition.

2. Passing through (-2, 4) and (-1, -1).

Answer 1

@iGreen @SarahMotionless

Answer 2

@confluxepic @Ilovecake

Answer 3

what do you think?

Answer 4

Im gonna be honest I don't know how to do it.

Answer 5

hold up let me try to find a lesson

Answer 6

Okay cool

Answer 7

Heres an example
Point slope form is:

y-y1 = m(x-x1)...the subscripts are to denote the use of the points

So you're formula would be:

y - 0 = -2(x+2) the positive because two negatives become a positive

slope-intercept form is:

y=mx+b where m is the slope and b is the y intercept.

The problem is the y intercept is not given to you directly so you must solve for it using the slope and points:

y = mx+b
0 = -2(-2) + b
0 = 4 + b
-4 = b

Now use the y-intercept to set up the equation:

y = -2x-4

Answer 8

Okay ummm im not sure what to do

Answer 9

@amirreza1870 can you help me?

Answer 10

If you have two points you can find the slope of their line with this formula
\[m=\frac{ y _{2}-y _{1} }{ x _{2}-x _{1} }\]
then use one of your point in this formula\[y-y _{1}=m(x-x _{1})\]