Activity
In this activity, you will identify key features of quadratic functions by looking at their graphs and table of values.
Question 1
List these key features for the quadratic function shown in the graph:
• x-intercepts
• y-intercept
• vertex
• end behavior
• domain
• range
. decreasing interval
• increasing interval
• Intervals on which the function is positive
• Interval on which the function is negative
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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.