Question 103826
use y=2x+1 on a graph, find the variable y or x.
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You need two points to graph a line:
If x = 0 y = 2*0+1 = 1
If x = 2 y = 2*2+1 = 5
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Plot those two points: (0,1) and (2,5) 
and draw a line thru them.
That is the graph you want.
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{{{graph(400,300,-10,10,-10,10,2x+1)}}}
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Cheers,
Stan H.