Question

use the equation of the trend line to predict the number of empty seats if there are 19 students present. the trend line equation is y = -x + 22. the chart has x - axis as number of students present and y - axis as number of empty seats, with points like (1,21) and (16,6).

Explanation:

Step1: Identify the variable

The number of students present is \( x \), and we need to find the number of empty seats \( y \) when \( x = 19 \). The trend line equation is \( y=-x + 22 \).

Step2: Substitute \( x = 19 \) into the equation

Substitute \( x = 19 \) into \( y=-x + 22 \):

$$ y=-19 + 22 $$

Step3: Calculate the value of \( y \)

Simplify the right - hand side: \( y = 3 \).

Answer:

3