For you to be able to find the graph of the line, you will need two points (or two set of coordinates). In cases like this, all you have to do is find the intercepts of the line.
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For the y-intercept, you set x=0
y = x + 1
if x=0, then
y = 0 + 1
y = 1
Your y-intercept will be (0,1)
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For the x-intercept, you set y=0
y = x + 1
if y=0, then
0 = x + 1
x = -1
Your x-intercept then is (-1,0)
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Since we already have two points, then we can graph the line y = x + 1
