The answer is D. Linear equation
Start at 4.
So far you have: 4
Now you go 7 units left. Going left means a subtraction. Going 7 units left means subtracting 7.
So far you have: 4 - 7
The result is -3.
The subtraction is:
4 - 7 = -3
Scalene triangle, Equilateral Triangle, Right Triangle, and Isosceles Triangle
