Question

what is an equation for the line that passer through points (-1,-4 and (1,4) write the equation is slope intercept form

Answer 1

you almost done writing ?

Answer 2

we need to find the slope first by using the slope formula :
slope(m) = (y2 - y1) / (x2 - x1)
(-1,-4) x1 = -1 and y1 = -4
(1,4) x2 = 1 and y2 = 4
now we sub
slope(m) = (4 - (-4)) / (1 -(-1))
m = (4 + 4) / (1 + 1)
m = 8/2
m = 4

now that we know the slope is 4 and we have a set of points, we will use the point slope formula: y - y1 = m(x - x1)
slope(m) = 4
you can use either of your sets of points...I will use (1,4)
(1,4) x1 = 1 and y1 = 4
now lets sub
y - 4 = 4(x - 1) -- distribute through the parenthesis
y - 4 = 4x - 4 -- add 4 to both sides
y = 4x - 4 + 4
y = 4x

any questions ?

Answer 3

no i think i have it that you

Answer 4

no problem :)