Would any one me with this? my mom made a review thing for me to prepare for my midterm and i can't figure this one problem out. if someone could walk me through this i would be eternally grateful!

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

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.

What is the slope of the line passing through the points (-5, 7) and (-3,5)?