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how do you find the y-intercept in a equation?

Sagot :

Substitute x value for 0 and calculate y.
AL2006
If you look at any graph, you'll notice that at the point where the graph crosses
the y-axis, the x-value of the graph is zero.  Does that give you any ideas ?

Just take the equation, call 'x' zero, then solve whatever is left for 'y'.