Question 850770: I need help answering which of the following is the equation of a line that passes through (-2,-1)and (-4,-3) Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website! standard form for a line is y = mx +b where m is slope and b is y axis intercept
m is defined as change in y divided by change in x
using the two given points
m = (-3 - (-1)) / (-4 - (-2)) = -2 / -2 = 1
we can use the point (-2, -1) in the standard form to determine b
-1 = -2 +b
b = 1
therefore the equation of the required line is
y = x +1
