Alg 2 review (sem 1)

Stats

100

What do you call a data point that doesn't fit in with the rest of the data?

An Outlier

200

When a constant is added to a set of data, the _____________ does NOT change.

Shape

Spread

Standard Deviation

Range

IQR

300

When data is skewed right, the mean is ____________ the median.

Greater than.

400

Find the Z-score for 95 if the mean is 75 and the standard deviation is 10.

2

500

A normal distribution has a mean of 76 and a standard deviation of 9.

Find     P ( 91 < x < 100 )

0.4837

Lines

100

What is the equation for a line in slope-intercept form?

y = mx + b

200

Find the slope.

(1, -5), (1, 2)

Undefined

300

Write this equation in slope-intercept form.

6x - 4y = 12

y = 3/2 x - 3

400

The graph of the inequality  y > 2x + 6

has a __________ line and

has shading __________ the line.

dotted/dashed

above

500

Find the equation of the best-fitting line.

x: -2, -1,   0,    1,    2,   3,   4,   5

y:  4,  3,  2.5,   2,  0.5, -1,  -2,  -3

y = -x + 2.3

Systems

100

Which of the following is NOT a way to solve a system.

Graphing

Substitution

Addition/Elimination

Fill in the blank

Matrices

Fill in the blank

200

Which is a solution to the system?

3x + y = 3    and    4x + 3y = -1

(-2, -1)     or     (2, -3)    or    (1, -4)

(2, -3)

300

Solve the System.

3x + 5y = 5

2x - 3y = 16

(5, -2)

400

Multiply the matrices together

[2    -3                      [ 4     2

-1     0                       -1     1]

-2      4]                              

 

[11      -1

-4        -2

-12       0]

500

Solve

2x + y + 3z = 5

-x + 3y + z = -14

3x - y - 2z  = 11 

(3, -4, 1)

Quadratics

100

Solve:

4x² + 64 = 0

x =   4i , x = -4i

200

Find the vertex

-x² - 2x - 6

(-1, -5)

300

Solve by factoring:

x² + 12x = 45

x = -15, x = 3

400

Find the discriminant:

3x² - 24x - 48 = 0

600

500

Write in vertex form:

y = x² - 8x + 13 

y = (x - 4)² - 3