All Flashcards
What is a polynomial function?
A sum of terms, each consisting of a coefficient and a variable raised to a non-negative integer power.
What is the degree of a polynomial?
The highest power of the variable in the polynomial.
What is a rational function?
A ratio of two polynomial functions, expressed as .
What is a vertical asymptote?
A vertical line where the function approaches infinity or negative infinity as approaches .
What is a horizontal asymptote?
A horizontal line that the function approaches as approaches infinity or negative infinity.
What is a hole in a rational function?
A point where the function is undefined because a factor cancels out in both the numerator and denominator.
Define rate of change.
How quickly a function's output changes with respect to its input.
What are complex zeros?
Zeros of a polynomial function that are complex numbers.
Define leading coefficient.
The coefficient of the term with the highest power in a polynomial.
What is end behavior?
The behavior of a function as approaches positive or negative infinity.
What is the general form of a polynomial function?
What is the general form of a rational function?
, where and are polynomials.
How to find the average rate of change of a function over the interval ?
What is the formula for slope (rate of change) of a linear function?
How do you determine the horizontal asymptote of a rational function when the degree of the numerator and denominator are the same?
If , then
How do you determine the horizontal asymptote of a rational function when the degree of the numerator is less than the degree of the denominator?
How do you determine the horizontal asymptote of a rational function when the degree of the numerator is greater than the degree of the denominator?
There is no horizontal asymptote. Consider long division to find slant asymptote if the degree of the numerator is exactly one more than the degree of the denominator.
How do you find the zeros of a polynomial function?
Set and solve for .
How do you find the vertical asymptotes of a rational function?
Set the denominator and solve for , excluding any values that are also zeros of the numerator.
How do you find the holes of a rational function?
Find common factors in the numerator and denominator. The -value where the factor equals zero is the location of the hole.
What does a vertical asymptote on the graph of a rational function indicate?
A value of where the function approaches infinity or negative infinity, and the function is undefined.
What does a hole on the graph of a rational function indicate?
A value of where the function is undefined, but the limit exists. It occurs due to a common factor in the numerator and denominator.
How can you identify the end behavior of a polynomial from its graph?
Observe the behavior of the graph as approaches positive and negative infinity. Note whether the graph rises or falls on each end.
How can you identify the zeros of a polynomial from its graph?
The zeros are the -intercepts of the graph, where the graph crosses or touches the -axis.
What does the graph of a linear function look like, and what does it tell you about its rate of change?
It's a straight line, and the slope of the line represents the constant rate of change.
What does the graph of a quadratic function look like, and what does it tell you about its rate of change?
It's a parabola, and the rate of change varies, increasing or decreasing depending on the location on the parabola.
How can you identify a hole in a rational function's graph?
It appears as an open circle (or removable discontinuity) at a specific point on the graph.
How does the multiplicity of a zero affect the graph of a polynomial?
If the multiplicity is odd, the graph crosses the x-axis. If the multiplicity is even, the graph touches the x-axis and turns around.
What does a horizontal asymptote on the graph of a rational function indicate?
It shows the value that the function approaches as x goes to infinity or negative infinity.
How can you identify the leading coefficient's sign from the end behavior of a polynomial graph?
If the graph rises to the right, the leading coefficient is positive. If the graph falls to the right, the leading coefficient is negative.