For the first one in order to find the missing values you have to find the average rate with the points giving, so you will do y2-y1/x2-x1, so this will be -1+4/1+2→3/3 now divide and get 1.. this means that our slope 1 now plot the points in a graph... and you will see that the y value of -3 is -5, the one for -1 is -3 and the one for 0 is -2.... now to the next 2 I am not quite sure could you explain those better.. and the last one just add 6 to both sides to leave y by itself and the answer will be y=
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I am sorry i couldn't help with all and hope this helps