line of best fit and scatter plots
what is the formula for line of best fit?
what is slope intercept form
when variables tend to move in a positive direction
what is a positive correlation
does correlation always relate to causation?
no, not always
what is a positive correlation
a correlation coefficient is positive when r is between 0 and 1
what is interpolation?
what is measuring values within a data set
what does the y-intercept mean
when variables tend to move in a negative direction
what is a negative correlation
what is a confounding variable?
what is a factor that is unknown or unobserved that influences the dependent variable
what is a negative correlation coefficient
a correlation coefficient that is negative is when r is between -1 and 0
what is extrapolation
what is measuring values outside of a data set
what axis most commonly represents time?
what is the X value
what is a strong correlation
what is a correlation between 0.5 and 1
what type of correlation is r=-0.7
what is a strong negative correlation
what is a perfect negative correlation?
what is r=-1
why should you be careful while using Extrapolation?
the farther you get from the original data set, the less accurate the data becomes.
what is a scatter plot?
what is a type of graph that uses points to show values for two different variables
what is a weak correlation
what is a correlation between 0 and 0.5
what is the correlation of r= 0.3
what is a weak positive correlation
what is a perfect positive correlation
what is r=1
what does the equation y=5x+7 mean?
this equation means that the line of best fit starts at (0,7) and goes up by 5 y units for every x unit.
What is another name for the line of best fit?
what is a trend line
what is r
What is Bivariate Data?
What is a data set that involves two variables
True or False:if the correlation coefficient "r" is negative (ex: -0.67) there is no correlation
false
If the data set is measuring amount of Ice cream sales during summer, and x represents degrees increased and y represents the amount of Ice creams sold, what would the equation y= 2x+1 mean
the line of best fit starts at 1 ice cream sold, and for every degree the temperature increases 2 extra ice creams are sold.