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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 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 + mx (addition). Exponential: f(x)=abxf(x) = ab^x (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).

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.