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The initial value of the linear function is the y-intercept, which is the point where the line crosses the y-axis. In this case, the line passes through the point (-4, -10/3), which means that the initial value is -10/3.
The rate of change of the linear function is the slope of the line. To find the slope, we can use the formula:
m = (y2 - y1) / (x2 - x1)
Let's use the points (-4, -10/3) and (-1, -4/3):
m = (-4/3 - -10/3) / (-1 - -4)
m = (6/3) / (3)
m = 2/3
Therefore, the rate of change of the linear function is 2/3.