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

  1. Calculate the slope using m=(y2y1)/(x2x1)m = (y_2 - y_1) / (x_2 - x_1). 2. Use the point-slope form: yy1=m(xx1)y - y_1 = m(x - x_1). 3. Simplify to slope-intercept form if needed.
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How do you determine the equation of a line given two points?

  1. Calculate the slope using m=(y2y1)/(x2x1)m = (y_2 - y_1) / (x_2 - x_1). 2. Use the point-slope form: yy1=m(xx1)y - y_1 = m(x - x_1). 3. Simplify to slope-intercept form if needed.

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

Examine the base bb in f(x)=abxf(x) = ab^x. If b>1b > 1, it's growth. If 0<b<10 < 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 tt in the function V(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^x to get two equations. 2. Solve for aa in one equation. 3. Substitute the expression for aa into the other equation and solve for bb. 4. Substitute the value of bb back into the equation for aa.

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

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

How to determine the common difference in an arithmetic sequence?

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

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_n.

How do you convert an exponential function from base bb to base ee?

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

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

Use the point-slope form: yy1=m(xx1)y - y_1 = m(x - x_1), where (x1,y1)(x_1, y_1) is the given point and mm 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 aa in the function f(x)=abxf(x) = ab^x.

What is the formula for a linear function?

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

What is the formula for an arithmetic sequence?

an=a0+dna_n = a_0 + dn

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

f(x)=yi+m(xxi)f(x) = y_i + m(x - x_i)

What is the formula for an exponential function?

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

What is the formula for a geometric sequence?

gn=g0rng_n = g_0 * r^n

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

gn=gkr(nk)g_n = g_k * r^(n-k)

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

f(x)=yir(xxi)f(x) = y_i * r^(x-x_i)

Formula for arithmetic sequence with a known term?

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

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

m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}

What is the decay factor formula?

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

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 bb in an exponential function f(x)=abxf(x) = ab^x?

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