Can someone help me please

 Choice B.  slope = -1/2,  y intercept = 1

Explanation:

The line goes downhill as we move from left to right. This means the slope is negative. We can rule out anything that has a positive slope. The answer is between A and B.

We can rule out choice A because the y intercept is actually 1 (not 2) because it crosses the y axis here. The only thing left is choice B.

The slope is -1/2 because moving from (0,1) to (2,0) means we move down 1 unit and over to the right 2 units.

slope = rise/run = -1/2

rise = -1 indicates a drop of 1

run = 2 means we move to the right 2 units

You can use the slope formula to get the same result

I'll use the two points (0,1) and (2,0)

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

m = (0 - 1)/(2 - 0)

m = -1/2

You could use any other two points you want as long as they are on the diagonal line.

since no one answered yet i will give it a shot, not completely sure tho.

i think it should be y=cos(x+2pi), (third answer, answer c)

good luck.