1.What is the slope of the line? (simplify your answer)

2. What is the value of a?

3. What is the value of b?

4. What is the y-coordinate when x = 0?

Select a graph that have an equation with a < 0

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.

Three lines meet at a point. set up and solve an equation to find the value of (a) is your answer reasonable? explain how you know