Chapters 1-4

Question 1

Rational numbers

Answer 1

Numbers that can be written as fractions or decimals that end or repeat. Ex. 1/2, .45, etc.

Question 2

Integers

Answer 2

Whole numbers and their opposites. -1, 1, -2, 2, 0 etc.

Question 3

Whole numbers

Answer 3

0,1,2,3. Etc. no negatives, fractions, or decimals

Question 4

Natural numbers

Answer 4

1,2,3,4 etc. also called counting numbers

Question 5

Irrational numbers

Answer 5

Numbers that never repeat or end

Ex. pi or square root 2

Question 6

Real numbers

Answer 6

Any number we have studied so far!

Question 7

To add fractions you need…

Answer 7

A common denominator

Question 8

To multiply fractions you

Answer 8

Multiply across

Question 9

To divide fractions you..

Answer 9

Keep the first fraction
Change to multiplication
Flip the second fraction

Question 10

On the motion dectector, moving forward goes ___________ and moving backward or away goes_______________

Answer 10

Down, up

Question 11

If one speed is faster than another than the slope of the faster line will appear ________________

Answer 11

Steeper

Question 12

For graphing motion, the X-axis measures_____________and the y-axis measures _________________

Answer 12

Time, distance

Question 13

If two lines are parallel, then their slopes________________________

Answer 13

Are the same

Question 14

If two lines are perpendicular, then their slopes are

Answer 14

Opposite reciprocals Ex. 2/3 would be -3/2

Question 15

What do you do:

Find an equation for a line through (2,4) and (-2,5) in slope intercept form

Answer 15

Start by finding the slope using y2-y1/x2-X1. Then set up a proportion using the slope and one point

Question 16

What do you do:

Find the equation for a line with slope 4 through (1, 5)in slope intercept form

Answer 16

Set up a proportion using the slope and the point. 4/1 = y-5/X-1

Question 17

What do you do:

Write in point slope form if you know the slope is 4 and it goes through (2,5)

Answer 17

Plug in 4 for m and (2,5) for X1 and y1

Y-5=4(X-2)

Question 18

How do you graph y =2/3x - 4?

Answer 18

Start at -4 on the y-axis and go up 2, over 3

Question 19

Name all the perfect squares from 1-100

Answer 19

1,4,9,16,25,36,49,64,81,100

Question 20

How do you test for direct variation?

Answer 20

Divide y/X for each ordered pair and check if all the ratios are the same

Question 21

What is a function?

Answer 21

A relation where for every X there is exactly one y.

Question 22

How do you test to see if a graph is a function?

Answer 22

Vertical line test

Question 23

What do you do first?

Find the equation of a line perpendicular to y = 3x + 2 through (4,3).

Answer 23

Change the slope from 3/1 to -1/3