Answer:

General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS 
- Brackets 
 - Parenthesis 
 - Exponents 
 - Multiplication 
 - Division 
 - Addition 
 - Subtraction 
 
Algebra I
- Coordinates (x, y)
 - Slope Formula: 

 
Explanation:
Step 1: Define
Point (-10, 6) → x₁ = -10, y₁ = 6
Point (-15, 7) → x₁ = -15, y₁ = 7
Step 2: Find slope m
Simply plug in the 2 coordinates into the slope formula to find slope m
- Substitute in points [Slope Formula]: 

 - [Fraction] Subtract/Add: 

 - [Fraction] Convert: 
