x's under the denominator and x's under an even root. - When finding the domain of a rational function, always assume all real numbers, then look for..., p(x)=0. - When graphing a rational function, to find the x-intercept, set, q(x)=0. - To find the vertical asymptote, solve, set the equation=HA and solve. - To find if the graph crosses the horizontal asymptote, , Determine symmetry. - What is the first step of graphing a rational functions?, Find y-intercept. - What is the third step of graphing a rational function?, Sub (-x) in for (x), if f(-x)=f(x) y-axis; if f(-x)=-f(x) origin. - How do you determine symmetry?, Set x=0, and solve. - How do you find y-intercept?, dashed line. - An asymptote is always denoted by a, hole in the graph at x=a. - When there is a cancellation, this always leaves a,

3.6 Graphs of Rational Functions

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