Question

Find the equation (in slope-intercept form) of the line passing through the points with the given coordinates. (-5, -4), (-3, 4)

Answer 1

m=(4-(-4))/(-3-(-5))=4
y=4x+c
4=4*(-3)+c
c=16

equation is y=4x+16

Answer 2

Where did the 16 come from? I got to 4x and got lost.

Answer 3

after he got slope a more common way to find the equation is :
y-y1=m(x-x1) where x1 and y1 are the coordinates for EITHER of the two points used to find the slope. so choosing the first:
y-(-5)=4(x-(-4))
y+5=4x+16
y=4x+11

Answer 4

except i messed up**
should read y+4=4(x+5)
y=4x+20-4
y=4x+16

Answer 5

4=4*(-3)+c
c=16