review of numbers;
whole number: 0,1,2,3,4,5, etc
integers: whole numbers and their negatives so -5,-4,-3,-2,-1,0,1,2,3,4...
rational numbers: numbers that can be written in form a/b where a and b are integers, so like 1/2 and 3/5
real numbers: includes rational numbers and irrational numbers like pi
18
x values are -3,-2,-1, 0, 1 which are integers
19. for y=x+3, you cand use any real number, so the answer would be real numbers
20.I don't know what error our friend made since the plots are correct but the red loines are wrong
21. just connect the dots on the plot, plot (0,3), (1,4) and connect the dots witha line
