Which table represents a linear function?

This is so hard and it’s for a test

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.