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  1. AP Pre Calculus
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Define a linear function.

A function of the form f(x)=b+mxf(x) = b + mxf(x)=b+mx, where bbb is the y-intercept and mmm is the slope.

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Define a linear function.

A function of the form f(x)=b+mxf(x) = b + mxf(x)=b+mx, where bbb is the y-intercept and mmm is the slope.

What is the slope of a line?

The rate of change of a linear function; steepness and direction.

Define an arithmetic sequence.

A sequence with a constant difference between consecutive terms, defined as an=a0+dna_n = a_0 + dnan​=a0​+dn.

What is the common difference in an arithmetic sequence?

The constant value added to each term to get the next term.

Define an exponential function.

A function of the form f(x)=abxf(x) = ab^xf(x)=abx, where aaa is the initial value and bbb is the base.

What is the base of an exponential function?

The factor by which the function's value changes for each unit increase in xxx.

Define a geometric sequence.

A sequence with a constant ratio between consecutive terms, defined as gn=g0∗rng_n = g_0 * r^ngn​=g0​∗rn.

What is the common ratio in a geometric sequence?

The constant value by which each term is multiplied to get the next term.

What is the y-intercept?

The point where the line crosses the y-axis, where x=0x=0x=0.

What does the initial value represent in an exponential function?

The starting value of the function when x=0.

What are the differences between linear and exponential functions in terms of rate of change?

Linear: Constant rate of change (constant slope). Exponential: Proportional rate of change (constant ratio).

What are the key differences between arithmetic and geometric sequences?

Arithmetic: Constant difference between terms. Geometric: Constant ratio between terms.

Compare the general forms of linear and exponential functions.

Linear: f(x)=b+mxf(x) = b + mxf(x)=b+mx (addition). Exponential: f(x)=abxf(x) = ab^xf(x)=abx (multiplication).

What are the differences between using addition and multiplication in linear and exponential functions?

Linear: Constant addition of slope. Exponential: Constant multiplication by the base.

Compare the parameters needed to define linear and exponential functions.

Linear: Initial value (y-intercept) and slope. Exponential: Initial value and base.

How do the domains of sequences and functions differ?

Sequences: Usually positive integers. Functions: Can have a wider range of values, like all real numbers.

Compare how linear and exponential functions are affected by transformations such as shifts and stretches.

Linear: Shifts and stretches affect slope and y-intercept directly. Exponential: Shifts and stretches affect initial value and base, impacting growth/decay rate.

What are the similarities and differences between modeling simple interest and compound interest?

Simple Interest: Modeled by linear functions (constant addition). Compound Interest: Modeled by exponential functions (constant multiplication).

Compare the long-term behavior of linear and exponential functions.

Linear: Grows (or decays) at a constant rate. Exponential: Grows (or decays) much faster in the long run.

How do you determine if a real-world situation is best modeled by a linear or an exponential function?

Linear: Look for constant addition/subtraction. Exponential: Look for constant multiplication/division (percentage increase/decrease).

How do you determine the equation of a line given two points?

  1. Calculate the slope using m=(y2−y1)/(x2−x1)m = (y_2 - y_1) / (x_2 - x_1)m=(y2​−y1​)/(x2​−x1​). 2. Use the point-slope form: y−y1=m(x−x1)y - y_1 = m(x - x_1)y−y1​=m(x−x1​). 3. Simplify to slope-intercept form if needed.

How do you determine if a function represents exponential growth or decay?

Examine the base bbb in f(x)=abxf(x) = ab^xf(x)=abx. If b>1b > 1b>1, it's growth. If 0 < b < 1, it's decay.

How do you find the value of an exponential function after a certain number of years?

Substitute the number of years for ttt in the function V(t)=a(b)tV(t) = a(b)^tV(t)=a(b)t and calculate the result.

How do you find the equation of an exponential function given two points?

  1. Substitute the points into f(x)=abxf(x) = ab^xf(x)=abx to get two equations. 2. Solve for aaa in one equation. 3. Substitute the expression for aaa into the other equation and solve for bbb. 4. Substitute the value of bbb back into the equation for aaa.

How do you solve for ttt in an exponential decay problem?

  1. Set up the equation V(t)=a(b)tV(t) = a(b)^tV(t)=a(b)t. 2. Isolate the exponential term. 3. Take the logarithm of both sides. 4. Solve for ttt.

How to determine the common difference in an arithmetic sequence?

Subtract any term from its subsequent term: d=an+1−and = a_{n+1} - a_nd=an+1​−an​.

How to determine the common ratio in a geometric sequence?

Divide any term by its preceding term: r=gn+1/gnr = g_{n+1} / g_nr=gn+1​/gn​.

How do you convert an exponential function from base bbb to base eee?

Use the identity bx=exln(b)b^x = e^{x ln(b)}bx=exln(b), so f(x)=abxf(x) = ab^xf(x)=abx becomes f(x)=aexln(b)f(x) = ae^{x ln(b)}f(x)=aexln(b).

How to write the equation of a line given a point and a slope?

Use the point-slope form: y−y1=m(x−x1)y - y_1 = m(x - x_1)y−y1​=m(x−x1​), where (x1,y1)(x_1, y_1)(x1​,y1​) is the given point and mmm is the slope. Then, rearrange to slope-intercept form if needed.

How do you determine the initial value of an exponential function from a table of values?

Find the y-value when x=0. This value is the initial value aaa in the function f(x)=abxf(x) = ab^xf(x)=abx.