Finding the x and y Intercepts of Any Function

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Jason
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Joined: Sun Dec 21, 2025 8:56 pm

Finding the x and y intercepts is as simple as plugging 0 into the "other" variable.
\(ex.\,\,a\)

\(What\,\,is\,\,the\,\,x\,\,intercept\,\, or\,\, x\,\, intercepts?\)

\(y = \dfrac{4x + 3}{2x - 3}\)

\(0 = \dfrac{4x + 3}{2x - 3} \)

\(0 = \dfrac{(2x - 3)(4x + 3)}{1}\)


\(0 = 2x - 3 \)

\(0 + 3 = 2x - 3 + 3\)

\(3 = 2x\)

\(\dfrac{3}{2} = \dfrac{2x}{2}\)

\(\dfrac{3}{2} = x\)


\(0 = 4x + 3\)

\(0 - 3 = 4x + 3 - 3\)

\(-3 = 4x\)

\(\dfrac{-3}{4} = \dfrac{4x}{4}\)

\(\dfrac{-3}{4} = x\)


\(therefore\,\,the \,\,x\,\,interecepts\,\,are:\)


\((\dfrac{3}{2}, 0) \,\,and\,\, (\dfrac{-3}{4}, 0)\)
 

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