Question

Find the equation of the line that passes through the points A (4, 4) and B (1, 7).

Answer 1

`y=-x+8`

Explanation:

`(4,4)(1,7)`

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

`(7-4)/(1-4)`

`(3)/(-3)`

`-1`

`y=-x+b`

Use any of the two points to find the y-intercept

`4=-1(4)+b`

`4=-4+b`

`b=8`

Equation:
`y=-x+8`