Question

What is the equation of the following line written in general form? (The y-intercept is -1.)

Answer 1

Answer:

The correct answer is 2x - y - 1 = 0

Step-by-step explanation:

To find this, use the ordered pair (1, 1) in any of the equations. If it results in a true statement then this can be an equation.

2x - y - 1 = 0

2(1) - (1) - 1 = 0

2 - 1 - 1 = 0

0 = 0 (TRUE STATEMENT)

Answer 2

Answer:

Option 3 - $2x-y-1=0$

Step-by-step explanation:

To find : What is the equation of the following line written in general form?

Solution :

According to graph line passes through point (1,1).

The equation which satisfy the point is the required equation,

1) $2x+y-1=0$

Put x=1 and y=1,

$2(1)+(1)-1=0$

$2\neq 0$

Not satisfied.

2) $-2x-y-1=0$

Put x=1 and y=1,

$-2(1)-(1)-1=0$

$-4\neq 0$

Not satisfied.

3) $2x-y-1=0$

Put x=1 and y=1,

$2(1)-(1)-1=0$

$0=0$

Satisfied.

Therefore, the required equation is $2x-y-1=0$

So, Option 3 is correct.