Choose all that apply when describing r2. (hint: 5 options are correct) (select all that apply.) is only used in multiple linear regression. represents the percent of variability in y that can be explained by the model. can be inflated by removing variables. only describes the relationship between quantitative variables. in simple linear regression, it is equal to the correlation coefficient r2. referred to as the coefficient of determination or coefficient of multiple determination. can be inflated by adding more variables. is used to determine the fit of a model. r2 = 1 − =

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave