Question

Question #19e0b

Answer 1

`a = 3`

Explanation:

`x + y = 2`
`=> y = -x + 2`

Comparing the above equation by `y = mx + c` we get,

`slope = m = -1`

Now, here, slope of the line by 2 points is given by,

`m = (y_2 - y_1)/(x_2 - x_1)`

As I stated earlier,
If the slope of the lines are equal, then the line are parallel or coincident

`:. (a + 1)/(-3 -1) = -1`

The value `a` comes out to be as `a = 3`

HOPE THIS HELPS