What is f(x) = 8x2 + 4x written in vertex form? f(x) = 8(x + one-quarter) squared – one-half f(x) = 8(x + one-quarter) squared – one-sixteenth f(x) = 8(x + one-half) squared – 2 f(x) = 8(x + one-half) squared – 4

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.