Data and Stats
On a dot plot, how do you know how many people responded to a survey?
Count the dots (or Xs)
What is the probability of rolling a 5 on a number cube?
1/6
Solve for y:
3y + 5 = 20
y = 5
Translate to an algebra expressions:
"A number decreased by eleven"
n - 11
Are these ratios proportional?
2/3 and 10/15
Yes (both top and bottom times 5)
Minimum
1/2 and 50%
-2m + 6 = 12
m = -3
Translate:
"Twice a number minus three is the same as fifteen"
2n - 3 = 15
Solve for x:
4/5 = 24/x
x = 30
FInd the MEAN of the data:
90, 100, 80, 90, 50
82
Which word would match up with "80%" chance?
a. impossible
b. likely
c. certain
b. likely
w/5 - 4 = 1
w = 25
Simplify using distribution:
8(9r - 3)
72r - 24
What are the 2 things that have to be true for a graphed line to be proportional?
1. Line must be straight
2. Line must run thru center/origin/middle
What is the MEDIAN?
10, 85, 15, 70
75
In the word MISSY, what are the odds of randomly drawing out an S?
2/5
2(7g + 3) = 34
g = 2
Simplify by combining like terms:
12g + 4g - 7g
9g
Why are these ratios NOT proportional?
3/11 = 18/55
*Top is times 6 and bottom times 5
*Not the same multiplier
On a box plot, how much is each section worth?
a. 50%
b. 100%
c. 25%
c. 25%
What is the chance of drawing a vowel out of BEEMER?
3/6 = 1/2 or 50%
1/2 (20h - 40) = 30
h = 5
"The product of a number and negative five"
-5n or -5 * n
If 4 graduation cakes requires 12 eggs, how many eggs would you need to make 20 cakes?
60 eggs (20 times 3 eggs each)