Plz help m on this question

The table represents a linear function. what is the slope of the function? –6 –4 4 6

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?