Unit Conversions And Help With Math Chap 03-1Test 1

Question 1

Directly Proportional means:

Answer 1

Two quantities increase or decrease together at a constant ratio

Example: an increase in A causes an increase in B, even if B is being multiplied by some factor

Question 2

Exponentially Proportional means:

Answer 2

A variable is squared or cubed- a small change in that variable will cause a big change in the other

Google Definition:
the rate of change of a quantity is directly proportional to the quantity itself.
Essentially; the faster something is changing, the larger its current value is

Question 3

Directly Related means:

Answer 3

An increase in A caused the same kind of change, an increase, in B, but it is not specified by how much

(could be either proportional or exponential)

Question 4

Inversely / Indirectly Proportional:

Answer 4

Two variables change by exactly the same magnitude, but in opposite directions.
If one doubles, the other must be cut in half

• When one quantity increases, the other decreases or optionally and vice versa.
  Essentially; the two quantities behave in opposite directions

Question 5

Converting a fraction to a decimal, what do you do?

Answer 5

divide the numerator (top #) by the denominator (bottom #)

2/5= 0.4

Question 6

Converting a decimal to a percentage:

Answer 6

Move the decimal point two places to the right

0.756 = 75.6 %

Question 7

Converting a percentage to a decimal:

Answer 7

Move the decimal point two places to the left

32.8% =0.328

Question 8

Order of Operations

Answer 8

PEMDAS

• Parentheses ( )
• Exponents
• Multiplications and Division’s
• Additions and Subtractions

Question 9

Factoring:

Answer 9

When two numbers are added or subtracted within parentheses, the whole set is multiplied by another factor, multiply each number by the factor and drop the parentheses