(-1,-4) this is saying that when x=-1, y=-4. Plugging it into the line equation y=4x gives

Which is correct.
All of them, I do believe.
I hope this helps :)
2 goes into 7, 3 times and you keep 2 the denominator and there is 1 left over so its
3 1/2
(-10)-3 to the second power is -19 as the answer.