Question

Im trying to do IXL and I dont understand the way my teacher teaches (ironic right?)

Answer 1

Answer:

(8,-9)

Step-by-step explanation:

I used desmos to find your answer and got to finding the point using the slope. Sadly I can't link it for you

Answer 2

Use the formula slope= y-y/x-x
-10-r/-2-8= 1/10
-10-r/-10= 1/10
Multiply the denominator (-10) on both sides
-10-r= -1
Add -10 to both sides
-r= 9
r= -9
Hope this helps!