Answer: In the absence of light, you could predict the current to be 0. This makes sense, because if there is no light then the solar cell won't work. Also, you can see that the data is heading towards 0.
When the light intensity is 1000, you could predict the current to be at about 100. Following the pattern in the data, it seems like you divide the light intensity by 10 to get the current. You could also graph the points.
3w + 8 - w = 4w - 2(w - 4) is an identity 3w-w + 8 = 4w - 2w + 8 2w + 8 = 2w + 8 2w - 2w = 8 - 8 0 = 0 zero equal to zero implies that any value of w satisfies the statement 3w + 8 - w = 4w - 2(w - 4) hence it is an identity.
