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To find the equation of the linear function, we need to first find the slope (m) and the y-intercept (b).
Slope (m) = (change in y) / (change in x)
m = (103 - 58) / (20 - 11)
m = 45 / 9
m = 5
Now let's use the slope and one of the points to find the y-intercept (b). We can use the first point (11, 58).
58 = 5(11) + b
58 = 55 + b
b = 3
Therefore, the equation of the linear function in y=mx+b form is:
y = 5x + 3