Question

1. the table represents some points on the graph of a linear function.

what is the rate of change of y with respect to x for this function?

Explanation:

Step1: Recall the formula for rate of change (slope)

The rate of change of a linear function (slope \( m \)) between two points \((x_1, y_1)\) and \((x_2, y_2)\) is given by \( m=\frac{y_2 - y_1}{x_2 - x_1} \). We can use any two points from the table. Let's choose \((x_1, y_1)=(-4, 29)\) and \((x_2, y_2)=(2, 2)\).

Step2: Substitute the values into the slope formula

Substitute \( x_1=-4 \), \( y_1 = 29 \), \( x_2=2 \), \( y_2 = 2 \) into \( m=\frac{y_2 - y_1}{x_2 - x_1} \).

$$ m=\frac{2 - 29}{2 - (-4)}=\frac{-27}{2 + 4}=\frac{-27}{6}=-4.5 $$

We can verify with another pair of points, say \((2, 2)\) and \((5, - 11.5)\).

$$ m=\frac{-11.5 - 2}{5 - 2}=\frac{-13.5}{3}=-4.5 $$

And with \((5, -11.5)\) and \((9, -29.5)\):

$$ m=\frac{-29.5-(-11.5)}{9 - 5}=\frac{-18}{4}=-4.5 $$

All pairs give the same slope, so the rate of change is consistent.

Answer:

\(-4.5\) (or \(-\frac{9}{2}\))