Question

15 (0, -9), (-1, -9)

Explanation:

Assuming the problem is to find the slope between the points \((0, -9)\) and \((-1, -9)\):

Step1: Recall slope formula

The slope \(m\) between two points \((x_1, y_1)\) and \((x_2, y_2)\) is given by \(m=\frac{y_2 - y_1}{x_2 - x_1}\).
Let \((x_1, y_1)=(0, -9)\) and \((x_2, y_2)=(-1, -9)\).

Step2: Substitute values into formula

Substitute \(x_1 = 0\), \(y_1=-9\), \(x_2=-1\), \(y_2 = -9\) into the slope formula:
\(m=\frac{-9-(-9)}{-1 - 0}\)

Step3: Simplify numerator and denominator

Simplify the numerator: \(-9-(-9)=-9 + 9=0\)
Simplify the denominator: \(-1-0=-1\)
So, \(m=\frac{0}{-1}=0\)

Answer:

The slope between the points \((0, -9)\) and \((-1, -9)\) is \(0\).