The table and scatter plot below show the price and overall quality rating for 15 different brands of bike helmets. Do you think that there is a statistical relationship between price and quality rating? If so, describe the nature of the relationship.

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

The students in a class were asked how many siblings they have. the data obtained is represented in the dot plot. the number of students who have no siblings is . the number of students who have three or more siblings is .