The scatter plot shows the total number of songs downloaded on a popular music service. Graph where the x- axis gives years after 2009 and runs from zero to five and beyond. The y- axis gives songs in billions and runs from zero to forty and beyond. A scatter plot line intersects the y- axis at (0, 5).

What is the equation of the linear model using two points on the line?
A. y = x + 10
B. y = 5x + 5
C. y = 10x + 1
D. y = 8x + 2

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Determine the vertex form of g(x) = x2 + 2x - 1. which graph represents g(x)? -nw -3-2-1, 1 1 2 3 -3 2- 1 -3- 1 2 3 - 1 2 3

What is the solution to the system of equations? y=1.5-3 y=-x