SOLUTION: I need help understanding and graphing the equation to find the y-intercept y+x=-7

Question 391526: I need help understanding and graphing the equation to find the y-intercept
y+x=-7
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
I need help understanding and graphing the equation to find the y-intercept
y+x=-7
You need to put the equation into the slope/intercept form (y = mx + b)
where m is the slope and b is the y intercept (occurs when x=0)
y + x = -7
subtract x from both sides and you have
y = -x - 7, slope in this case m=-1
:
Choose at least two values for x, and find y
Let x = -3
y = -(-3) - 7
y = 3 - 7; minus a minus is a plus
y = -4
plot the ordered pair, x=-3, y=-4
and
Let x = +2
y = -2 - 7
y = -9
plot the ordered pair, x=2; y=-9
:
Join these two points with a straight line
the graph should look like this

You can see the y intercept = -7, when x = 0
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