Answer:
D. 
Step-by-step explanation:
The given equation passes through:
(4,2) and (8,1).
The equation can be obtained using the formula;

The slope is given by:

Let
and
, then we have;

we now plug in the slope and the point to obtain;

We multiply through by 4 to obtain;

Expand using the distributive property;



Answer: last option. 9.2
Step-by-step explanation:
The pythagoreon theorm tells us, a^2+b^2 = c^2. We can substitute these values, so 7^2 + 6^2 = x^2 => 49+36 = x^2 => root of 85. The root of 85 is 9.219 something so you can round 9.219 to 9.2.
In all honesty I don’t know but it’s between 110 and 116