Which of the points A (0; 0), B (2; -4), C (5; 3), D (-4; 8) belong to the graph of the linear function y = -2x.

To check whether a point belongs to a given function, you need to substitute the value of a given point into the equation of the function, and check if the expression is correct.
a) 0 = – 2 * 0;
0 = 0.
Answer: point A (0; 0) belongs to the graph of the function.
b) – 4 = – 2 * 2;
– 4 = – 4.
Answer: point B (2; – 4) belongs to the graph of the function.
c) 3 = – 2 * 5;
3 ≠ – 10.
Answer: point C (5; 3) does not belong to the graph of the function.
d) 8 = – 2 * (- 4);
8 = 8.
Answer: point D (- 4; 8) belongs to the graph of the function