Answer:
It’s going to be b
Step-by-step explanation:
Because add then then divide then put the x on top and simplify then and then subtract
You can use a number line to add and subtract
The missing coordinate r is 11.
Solution:
Given points are (–15, 1) and (–7, r).

Slope (m) = 
<u>To find the missing coordinate r:</u>
Slope formula:

Substitute the given values in the formula.



Do cross multiplication.

40 = 4r – 4
Add 4 on both side of the equation.
44 = 4r
Divide by 4 on both side of the equation.
11 = r
⇒ r = 11
Hence the missing coordinate r is 11.
The distance between -10 and 9 is 19 and the distance between 2 and -7 is 9
Hope this helps