Slope
Define the Y-intercept.
Where the line on a graph crosses the Y-axis OR where X =0
What percentage indicates that an amount doubled?
100%
How do you find the median of a group of numbers?
Organize the numbers in order from least to greatest. Count the numbers and divide them in half. The number that is in the middle of the group of numbers is the median. (or similar)
A firefighter truck can hold 3000 gallons of water. A firefighter can deliver 160 gallons of water every 2 minutes. How long will it take for the fire fighter to empty the truck? (Don't forget units!)
37 minutes and 30 seconds
What is 20 Celsius in Fahrenheit?
68 degrees Fahrenheit
Identify the slope equation.
Y2-Y1/ X2-X1
The Air Jordan I “Top 3 Pick” came out almost two years ago, on November 28, 2016. The retail price was $160. They are currently being sold for $445 on StockX.com for a size 12. What is the percent increase from the time they came out with their retail price until now?
178.1% increase
True or false: 50% of the data falls between Q1 and Q3.
True
A boy who is 3 feet tall can cast a shadow on the ground that is 7 feet long. How tall is a man who can cast a shadow that is 14 feet long?
6 ft tall
A researcher wants to know what proportion of the 42,000 students at Penn State University are regular smokers. A survey was administered to 987 random students. 43% of the students reported they smoke regularly. Identify the population, parameter, sample, and statistic.
population: 42,00 students at Penn State University
parameter: how many are regular smokers
sample: 987 random students
statistic: 43% of students are regular smokers
Amazon spent $6 billion on shipping costs in the second quarter of 2018, compared to $4.6 billion in shipping costs in the second quarter of 2017. Draw coordinates where x is the year and y is the shipping costs in billions. Find the slope and interpret the context of the slope
m= 1.4
shipping costs increased by $1.4 billion per year
Angie took a math test and got 35 correct and 10 incorrect. What was the percentage of the correct answers?
77.78%
Find the median.
5,7,12,14,15,22,25,30,36,42,53
22
Mix 3 liters of water with 4 lemons to make lemonade. How many liters of water are mixed with 8 lemons?
6 liters
A magazine reporter wanted to learn about how many people typically spend at a local burger restaurant. The reporter spent a day at the restaurant and surveyed 250 randomly selected customers. Those 250 customers reported average spending $8.97. Identify the population, parameter, sample, and statistic.
Population: people that go to a local burger restaurant
Parameter: how much money people typically spend at a local burger restaurant
Sample 250 randomly selected customers
Statistic: an average of $8.97
The average lifespan of American women has been tracked, and the model for the data is y = 0.2t + 73, where t = 0 corresponds to 1960. T is in years. Explain the meaning of the slope and the y-intercept.
Slope = Every year, the life span of American women increases by 0.2 years
Y-int: In 1960, the lifespan of American women was 73 years
During a certain period, gas prices went up 150%. Before, gas prices were $1.98 per gallon. What is the price per gallon after the increase?
$4.95
Jason saves a portion of his salary from his part-time job in the hope of buying a used car. He recorded the number of dollars he was able to save over the past 15 weeks.
Dollars saved: 19, 12, 9, 7, 17, 10, 6, 18, 9, 14, 19, 8, 5, 17, 9
Draw the box plot and label the parts.
Min:5
Max:19
Median: 10
Q1:8
Q3:17
Mary reduced the size of a painting to a width of 3.3 in. What is the new height if it was originally 32.5 in tall and 42.9 in wide?
2.5 in
Calculate the mass in grams of 14.79 ml of a substance. Its density is 1.193 g/ml.
17.64 grams
The equation for the speed (not the height) of a ball which is thrown straight up in the air is given by v = 128 – 32t, where v is the velocity (in feet per second) and t is the number of seconds after the ball is thrown. With what initial velocity was the ball thrown? What is the meaning of the slope?
Initial velocity: 128 ft per second
Slope: speed of the ball decreases by 32 feet per second
There are 7,100 Target stores in the US. If this is 29% of all Target stores worldwide, how many Target stores are there world wide?
24,482.8 or 24,483 Target stores world wide
Write an equation to find median using the total number of objects, n.
median = (n+1)/2
John has 30 marbles; 18 are red and 12 are blue. Jane has 20 marbles that are either red or blue. If the ratio is the same for red to blue marbles for both John and Jane, how many red and blue marbles does Jane have?
8 blue and 12 red
What app did the professor mention in class that he uses on his phone to make money by taking surveys?
Google Rewards