2.5 Practice
For use after Lesson 2.5
00
2. y = 0.5x - 3
y = -6x + 10
Solve the system of linear equations using a table.
y = 8 + 6
y = 4.x - 3
Y=x+6
y=,5x-3
Y= bxt10
Y=4x3
2
Solve the system of linear equations using a graph.
3. y = 3.x + 1 m= be
4. y =
m=
ba
6
y = 5x – 8 m =
b =
y = - 2x. - 4 m =
b =
ту
LO
o
X
0
x
1-4 only

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

Two students were asked if they liked to read. is this a good example of a statistical question? why or why not? a yes, this is a good statistical question because a variety of answers are given. b yes, this is a good statistical question because there are not a variety of answers that could be given. c no, this is not a good statistical question because there are not a variety of answers that could be given. no, this is not a good statistical question because there are a variety of answers that could be given

Amachine that produces a special type of transistor (a component of computers) has a 2% defective rate. the production is considered a random process where each transistor is independent of the others. (a) what is the probability that the 10th transistor produced is the first with a defect? (b) what is the probability that the machine produces no defective transistors in a batch of 100? (c) on average, how many transistors would you expect to be produced before the first with a defect? what is the standard deviation? (d) another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. on average how many transistors would you expect to be produced with this machine before the first with a defect? what is the standard deviation? (e) based on your answers to parts (c) and (d), how does increasing the probability of an event a↵ect the mean and standard deviation of the wait time until success?