A parabola has a vertex at (3, -1) and roots at 2 and 4. Which equation below represents the parabola?
y=(x - 3)2 - 1 y = -(x - 3)2 - 1 y = (x + 3) - 1 y= -(x+3) - 1

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Anyone know these questions? i need ,.

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.