You need to calculate it's slope:
y2-y1 = m(x2-x1)
0-5 = m(3-2)
-5 = m
Now, it would be: y-5 = -5(x-2)
Answer: 2
Step-by-step explanation:
Quick question, why didn't you just use the calculator on the device you took this photo with? Anyway, the answer is 5.62