What is the rule. And is this a proportional linear function or a non proportional linear function? Thanks

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?