To determine the rate of change (slope) of the linear function given the coordinates (x1, y1) = (2.6, -6) and (x2, y2) = (3.2, 3), we can use the formula for the slope (m):
\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]
Substituting the given values:
\[ m = \frac{3 - (-6)}{3.2 - 2.6} \]
Calculating the numerator:
\[ 3 - (-6) = 3 + 6 = 9 \]
Calculating the denominator:
\[ 3.2 - 2.6 = 0.6 \]
Now, substituting these values into the slope formula:
\[ m = \frac{9}{0.6} \]
Dividing:
\[ m = 15 \]
The rate of change of the linear function is:
m = 15