Question

Find the equation of the line passing

through the points (4, 1) and (2, 9).
y = [? ]x + [ ]

Answer 1

y=-4x+17

Explanation:

Slope intercept form is
`(y2-y1)/(x2-x1)`

`(9-1)/(2-4)`

`(8)/(-2)`

-4

y=-4x+b

plug in one of the points to find b, I chose (4,1)

1=-4(4)+b

1=-16+b

add 16 to both sides

b=17

put it together and you get y=-4x+17