The values that complete the residual table a, b, c, d are as follows:
A straight-line graph takes the form y = mx + c, in which (m) refers to the gradient, (y) is the intercept, and (c) is the starting value when (x) is zero.
So, from the given information:
So, to estimate the value of (a) in the table, we have to replace (y = a) and (x = 1) in equation (1).
i.e.
To estimate the value of (b), we need to subtract the given value(12) from the predicted value (11.9)
To estimate the value of (c), we need to replace (y = c) and (x = 3) in equation (1).
To estimate the value of (d), we need to subtract the given value and predicted value.
Learn more about straight-line graphs here:
https://brainly.com/question/11765787