If the Child’s Score is 32, the predicted value for Adult’s IQ is 91
How to find the predicted value
The value of y when x = -2 is read from the graph to be -3
how to find the value
The predicted value is sought using the graph, and tracing.
From x = 32, trace (draw imaginary line) to the straight line (line of best fit) graphed,
At the point of intersection of the imaginary line (traced line) and the straight line. Check the corresponding value on the y-axis that associates with the line.
This value is read to be approximately 91