Question

A line has a slope of -1 and contains the points (1, 2) and (2, y). The value of y is 1 3 -1

Answer 1

1

Step-by-step explanation: I did the lesson submitted it and got this answer right you can also see if the answer above for a step-by-step explanation. Hope it helps UwU

Answer 2

For this case we have that by definition, the slope of a line is given by:

`m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}}`

We have as data that:

`m = -1\\(x_ {1}, y_ {1}) :( 1,2)\\(x_ {2}, y_ {2}) :( 2, y)`

Substituting we have:

`-1 = \frac {y-2} {2-1}\\-1 = \frac {y-2} {1}\\-1 = y-2\\-1 + 2 = y\\y = 1`

Finally, the value of y is 1.

Answer:

`y = 1`