8th Math Reference Sheet Brain Dump

Linear Equations

100

What is the equation used for a non-proportional relationship?

y=mx+b

200

What are three characteristics of a proportional relationship?

1. constant rate/slope

2. crosses through the origin

3. one part of the equation after the equal sign

300

What are the two ways we've learned to calculate "m"?

1. rise/run

2. lists & spreadsheets

400

What are the subsets that represent The Real Number System?

Irrational

Rational

Integers

Whole

Natural

500

What order must you click in the calculator when organizing a set of numbers from fastest to slowest?

Ascending

Area/Surface Area

100

What formula is used to find radius, when circumference of a circle is given?

C=2*pi*r

200

What does the Capital Letter B represent in this section?

Area of the base

300

Which shape do we not use in 8th grade math?

trapezoid

400

What part of the figure do Capital P and B refer to?

the perimeter of the base and the area of the base of the figure

500

What formula is used to calculate B in finding the total surface of a triangular prism?

1/2 bh

Volume/Pythagorean Theorem

100

What formula replaces B in the volume of a cylinder and cone?

pi * r²

200

What is the unit of measurement for volume?

units³

300

What are the two key words to determine when to use the Pythagorean Theorem?

Distance and Length

400

What letter represents the longest side of a right triangle?

C

500

What two other words do we call side C?

hypotenuse and diagonal

Transformations

100

What are the four transformations?

1. Translations

2. Reflections

3. Rotations

4. Dilations

200

Which transformations remain congruent after the change?

1. Translations

2. Reflections

3. Rotations

300

What transformation rule is used for a reflection over the x-axis?

(x,y) ------> (x,-y)

400

What transformation rule is used for a dilation with a scale factor of 2?

(x,y) -------> (2x,2y)

500

What transformation rule is used for a rotation counter clockwise of 270^o?

(x,y) --------> (y,-x)

Simple and Compound

100

Does the simple interest formula solve for interest or account balance?

interest

200

Does the compound formula solve for interest or account balance?

Account balance

300

What steps and equations are needed to solve for account balance of a simple account question?

1. I=Prt

2. P+I=A

400

What steps and equations are needed to solve for account balance of a compound account question?

1. A=P(1+r)^t

500

What steps and equations are needed to solve for interest of a compound account question?

1. A=P(1+r)^t

2. A-P=I