Question

Which line contains the point (1, -3)?

1. 4x-y=7 4 x − y = 7


2. 2x+5y=4 2 x + 5 y = 4


3. 7x-y=15 7 x − y = 15


4. x+5y=21

Answer 1

4x - y = 7

Explanation:

Put the values of x = 1 and y = -3 to the equations of a line and check the equality:

1. 4x - y = 7

4(1) - (-3) = 4 + 3 = 7 CORRECT

2. 2x + 5y = 4

2(1) + 5(-3) = 2 - 15 = -13 ≠ 7

3. 7x - y = 15

7(1) - (-3) = 7 + 3 = 10 ≠ 15

4. x + 5y = 21

1 + 5(-3) = 1 - 15 = -14 ≠ 21