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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.

Explain the relationship between linear functions and arithmetic sequences.

Arithmetic sequences are discrete points, while linear functions connect those points into a smooth line. Both involve an initial value and a constant rate of change.

Explain the relationship between exponential functions and geometric sequences.

Geometric sequences are discrete points, while exponential functions connect those points into a smooth curve. Both involve an initial value and a constant ratio.

What does a positive slope indicate?

A line that goes up from left to right. As x increases, y increases.

What does a negative slope indicate?

A line that goes down from left to right. As x increases, y decreases.

Describe exponential growth.

A function where the rate of increase is proportional to the current value, leading to rapid growth.

Describe exponential decay.

A function where the rate of decrease is proportional to the current value, leading to a rapid decline.

What is the significance of the base bbb in an exponential function f(x)=abxf(x) = ab^xf(x)=abx?

If b>1b > 1b>1, it represents exponential growth. If 0<b<10 < b < 10<b<1, it represents exponential decay.

How are linear functions and arithmetic sequences used to model real-world scenarios?

They model situations with constant change, such as population growth or simple interest.

How are exponential functions and geometric sequences used to model real-world scenarios?

They model exponential growth or decay, such as compound interest or radioactive decay.

What is the importance of domain when dealing with sequences and functions?

Sequences are usually defined for positive integers, while functions can have a wider range of values (like all real numbers).

What is the formula for a linear function?

f(x)=b+mxf(x) = b + mxf(x)=b+mx

What is the formula for an arithmetic sequence?

an=a0+dna_n = a_0 + dnan​=a0​+dn

What is the point-slope form of a linear function?

f(x)=yi+m(x−xi)f(x) = y_i + m(x - x_i)f(x)=yi​+m(x−xi​)

What is the formula for an exponential function?

f(x)=abxf(x) = ab^xf(x)=abx

What is the formula for a geometric sequence?

gn=g0∗rng_n = g_0 * r^ngn​=g0​∗rn

What is the formula for a geometric sequence with a known term?

gn=gk∗r(n−k)g_n = g_k * r^(n-k)gn​=gk​∗r(n−k)

What is the formula for an exponential function with a known point?

f(x)=yi∗r(x−xi)f(x) = y_i * r^(x-x_i)f(x)=yi​∗r(x−xi​)

Formula for arithmetic sequence with a known term?

an=ak+d(n−k)a_n = a_k + d(n-k)an​=ak​+d(n−k)

How do you calculate the slope (mmm) given two points (x1,y1)(x_1, y_1)(x1​,y1​) and (x2,y2)(x_2, y_2)(x2​,y2​)?

m=y2−y1x2−x1m = \frac{y_2 - y_1}{x_2 - x_1}m=x2​−x1​y2​−y1​​

What is the decay factor formula?

(1−r)(1 - r)(1−r), where rrr is the rate of decay.