What is the equation of the line shown in this graph? drag and drop the expressions to write the equation of the line in slope-intercept form. y = __ + choices : 4x , 2x , -x , -2x , 2 , 4 , -4 , -2

So, slope intercept form is y=mx+b.

"b" is the y value when x=0. Therefore, in this case y= mx+ 4. (y=4 when the line crosses the x-axis)

b=4

To find slope, pick two points on the line and use the slope equation to solve:

For example I picked the points they gave you: (1,2) (4,-4)

(x1,y1)= (1,2)
(x2,y2)= (4,-4)

slope is m= (y2-y1)/(x2-x1)

m= ((-4)-2)/(4-1)
m=(-6)/3
m= -2

So, put those together and you get your
y=mx+b
y= -2x+4

Make sense?