Answer:
y = x + 3.
Explanation:
To determine the linear function, we can use the two points given to calculate the slope and then use the point-slope formula.
The slope (m) is calculated as:
m = (y2 - y1) / (x2 - x1)
m = (10 - 18) / (7 - 15)
m = -8 / -8
m = 1
Using the point-slope formula, we can write the equation of the line as:
y - y1 = m (x - x1)
y - 18 = 1 (x - 15)
y - 18 = x - 15
y = x + 3
So, the linear function is y = x + 3.