A2 U8 D1&2 Review

What is the X-Intercept?

• x= 0
• x= 4
• x= 5
• x= -5

What are the x-intercepts?

• x= 2/3
• x= 4, x = -2
• x= -8, x = 1
• x= -4, x = 2

What is the Vertical Asymptotes? 

• x= -5
• x= 5
• x= 6
• x= -6

To find the y-intercept in a rational function you...

• substitute 0 for y in the original function.

• substitute 0 for x in the original function.

• substitute 0 for x in the simplified function.

• substitute 0 for y in the simplified function.

To find x-intercept(s) in a rational function you...

• Set the numerator equal to 0 in the original function.

• Set the denominator equal to 0 in the original function.

• Set the numerator equal to 0 in the simplified function.

• Set the denominator equal to 0 in the simplified function.

 $f\left(x\right)=\frac{3x-6}{x^2-4}$  has a y-intercept at:

•  $\left(0,3\right)$  

•  $\left(0,\frac{3}{2}\right)$  

•  $\left(2,0\right)$  

• There are no y-intercepts.

•  $\left(0,0\right)$  

Find the domain of

 $f\left(x\right)\ =\ \frac{x-3}{x+4}$ . 

•  $\left(-\infty,\ \infty\right)$  

•  $\left(-\infty,3\right)\cup\left(3,\infty\right)$  

•  $\left(-\infty,-4\right)\cup\left(-4,\infty\right)$  

•  $\left(-\infty,-4\right)\cup\left(-4,3\right)\cup\left(3,\infty\right)$  

What is the domain? 

• x≠ -5,5
• x≠ -5,4
• x≠ -4,5
• x≠ -4,-5

A vertical asymptote is found by setting the _________= to zero and solving for x 

• Numerator
• Denominator
• Right side 
• Left side

When creating an inverse you must...

• Switch the x and y
• Solve for x
• Draw a graph
• Potato