The time series graph gives some information about the number of umbrellas sold in a shop in the first six months of 2015.
The sales target for the first
100
six months of 2015 was to
sell a mean of 65 umbrellas
per month.
Did the shop meet this target?
Show how you get your answer.
Number of umbrellas sold

Data for the height of a model rocket launch in the air over time are shown in the table. darryl predicted that the height of the rocket at 8 seconds would be about 93 meters. did darryl make a good prediction? yes, the data are best modeled by a quadratic function. the value of the function at 8 seconds is about 93 meters. yes, the data are best modeled by a linear function. the first differences are constant, so about 93 meters at 8 seconds is reasonable. no, the data are exponential. a better prediction is 150 meters. no, the data are best modeled by a cubic function. a better prediction is 100 meters.