Which equation could have been used to create this graph? y = x + 5 y = x + 6 y = 6x y = 3x A coordinate graph. The horizontal axis is labeled x and ranges from 0 to 10. The vertical axis is labeled y and ranges from 0 to 30. A line connecting the points plotted at begin ordered pair 0 comma 0 end ordered pair, begin ordered pair 1 comma 6 end ordered pair, begin ordered pair 2 comma 12 end ordered pair, begin ordered pair 3 comma 18 end ordered pair, and begin ordered pair 4 comma 24 end ordered pair.

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.