Unit 3 Flashcard Statistics

Flashcard
•
Mathematics
•
8th - 10th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula to calculate coffee sales based on temperature?
Back
y = -60x + 6443, where x is the temperature and y is the coffee sales.
2.
FLASHCARD QUESTION
Front
What does a strong positive correlation indicate in a graph?
Back
A strong positive correlation indicates that as one variable increases, the other variable also increases.
3.
FLASHCARD QUESTION
Front
What is the linear regression equation for pizza sales if the equation is y = 1.5x + 12?
Back
This equation indicates that for every unit increase in x (independent variable), y (pizza sales) increases by 1.5.
4.
FLASHCARD QUESTION
Front
How do you write a linear regression equation from data points?
Back
You can use statistical methods like least squares to find the best-fitting line, expressed as y = mx + b.
5.
FLASHCARD QUESTION
Front
What is the equation of the line of best fit for the given data if it is y = 4.19x - 163.41?
Back
This equation shows that for every unit increase in x, y increases by 4.19, starting from -163.41.
6.
FLASHCARD QUESTION
Front
What does the slope in a linear equation represent?
Back
The slope represents the rate of change of the dependent variable with respect to the independent variable.
7.
FLASHCARD QUESTION
Front
What is the meaning of the y-intercept in a linear equation?
Back
The y-intercept is the value of y when x is 0, indicating where the line crosses the y-axis.
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