Question 409473
I understand that y=mx+b
5= -2(-1)+b
b=3   right??
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That's right.  Now you know the slope, m and the y-int, b
So y = mx + b
y = -x + 3 is the equation of the line.
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Pick 2 values for x and find y
x = 0, y = 3 --> (0,3)
x = 3, y = 0 --> (3,0)

Plot the two points, draw a line thru them