Graph the following {(x,y): x + y = 5}

For this case we have the following function:

We look for the points of intersection with the x axis, doing y = 0

We look for the points of intersection with the y axis, doing x = 0

We can also observe that the slope is -1.

See attached image

-1 (losing a point)

Step-by-step explanation:

it is a probability question

total possible outcomes= 3

favourable outcome(white) = 2

probability of getting a white is 2/3

probability of getting a green is 1/3

so the expected value of the game will be -1