Does A (3; -5) and B (4; 2) belong to the straight line 7x-5y-18 = 0.

In order to calculate whether a point belongs to the graph of the function, you need to substitute its values into the expression. If as a result we get the correct equality, then the point belongs to a straight line.

1) If x = 3 and y = -5, then 7 * 3 – 5 * -5 – 18 = 21 + 25 – 18 = 28.

Not belong.

2) If x = 4 and y = 2, then 7 * 4 – 5 * 2 – 18 = 28 – 10 – 18 = 0.

Belongs to function graphics.