The Answer to your problem is:
0.8
The rate of change is -2 :)
A line in the horizon meaning a straigh flat line, its counterpart is a vertical line which is up and down. If you look at an x/y line, the x line is the horizon line
The right answer is Option C.
Step-by-step explanation:
Given equations are;
-2x+4y=17 Eqn 1
3x-10y= -3 Eqn 2
Adding Eqn 1 and Eqn 2;

The right answer is Option C.
Keywords: linear equations, addition
Learn more about linear equations at:
#LearnwithBrainly
Answer: 2(x + 4)(x - 4)
Hope this helped!