All Flashcards
Difference between linear and polynomial models?
Linear: Straight line, constant rate of change | Polynomial: Curve, changing rate of change
Difference between polynomial and rational functions?
Polynomial: Can be written as a sum of terms with non-negative integer exponents. | Rational: Written as a ratio of two polynomials, may have asymptotes.
Difference between shifts and stretches of functions?
Shifts: Translate the graph without changing its shape. | Stretches: Change the shape by compressing or expanding the graph.
Difference between direct and inverse proportionality?
Direct: As one quantity increases, the other increases. | Inverse: As one quantity increases, the other decreases.
Difference between domain and range?
Domain: Set of possible input values (x). | Range: Set of possible output values (y).
Difference between continuous and piecewise functions?
Continuous: A single function defined over its entire domain without any breaks. | Piecewise: Defined by different functions over different intervals of its domain.
Difference between a vertical stretch and a horizontal compression?
Vertical Stretch: Multiplies the y-values by a factor, making the graph taller. | Horizontal Compression: Divides the x-values by a factor, making the graph narrower.
Difference between a vertical shift and a horizontal shift?
Vertical Shift: Moves the graph up or down by adding or subtracting a constant. | Horizontal Shift: Moves the graph left or right by adding or subtracting a constant from the x-value.
Difference between linear regression and polynomial regression?
Linear Regression: Finds the best-fitting straight line for the data. | Polynomial Regression: Finds the best-fitting polynomial curve for the data.
Difference between assumptions and restrictions in function modeling?
Assumptions: Simplifications made about the real-world scenario to create a tractable model. | Restrictions: Constraints on the domain or range of the function based on the real-world context.
Formula for gravitational force?
Formula for electromagnetic force?
Volume of a cylinder?
Volume of a cone?
How to shift a function horizontally by units?
. Right if , left if .
How to shift a function vertically by units?
. Up if , down if .
How to vertically stretch/compress a function by a factor of ?
. Stretch if , compress if .
How to reflect a function across the x-axis?
How to reflect a function across the y-axis?
General form of a rational function?
, where p(x) and q(x) are polynomials.
Steps to construct a linear model from data?
- Plot the data. 2. Determine if a linear relationship exists. 3. Find the slope and y-intercept. 4. Write the equation in slope-intercept form: .
Steps to model data with a polynomial function using regression?
- Plot the data. 2. Choose a polynomial degree based on the shape. 3. Use a calculator to perform polynomial regression. 4. Write the resulting equation.
Steps to create a piecewise function?
- Identify the intervals. 2. Determine the function for each interval. 3. Write the function with the corresponding domains.
How to determine the domain and range of a rational function in a real-world context?
- Identify any restrictions on the input variable (e.g., values that make the denominator zero). 2. Consider the physical limitations of the scenario (e.g., non-negative quantities). 3. Determine the possible output values based on the restricted domain.
Steps to solve a problem involving inverse proportionality?
- Identify the inversely proportional quantities. 2. Write the general form of the rational function: . 3. Use given data to find the constant of proportionality, . 4. Write the specific equation and use it to solve for the unknown.
How to find the value of a piecewise function at a given point?
- Identify the interval in which the point lies. 2. Use the function defined for that interval to calculate the value.
Steps to find the time it takes to fill a tank modeled by a piecewise function?
- Calculate the total volume of the tank. 2. Divide the total volume by the filling rate to find the time.
How to construct a function model when given a description of transformations?
- Start with the parent function. 2. Apply transformations step-by-step, writing the equation as you go. 3. Simplify the final equation.
How to determine the best type of function (linear, quadratic, exponential, rational) to model a given data set?
- Plot the data. 2. Look for patterns (straight line, curve, rapid growth/decay, inverse relationship). 3. Consider the real-world context. 4. Use regression to test different models.
How to deal with units in function modeling problems?
- Identify the units of each variable. 2. Make sure the units are consistent throughout the problem. 3. Include the correct units in your final answer.