Use the graph to answer the questions in Parts 1-3. Complete your work in the space provided. Part 1

Choose two points on the line. Calculate the rate of change between the points. Use the slope formula to show whether your calculations were correct.

Part 2

Use the slope and one of the points on the line to write the slope-intercept form of the line.

Part 3

Write the equation of the line in general form.

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.