This is a 3rd grade math question. I don't know how to explain it to a 9yr old

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

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.

Which number completes the system of linear inequalities represented by the graph? y > 2x – 2 and x + 4y >