8 1/3-6 5/6
convert both into an improper fraction
8 1/3=25/3
6 5/6=41/6
convert 25/3 to a fraction with a base of 6: 50/6
50/6-41/6=9/6
9/6 simplifies into 3/2
Answer:

Step-by-step explanation:
Trend line passes through the points (6,12) and (4,16).
Find the slope of the line:

Write the equation of the line in the form
where the slope 

This line passes through the point (6,12), then its coordinates satisfy the equation:

Answer:
second one Step-by-step explanation:
Step-by-step explanation:
x - 1.2 = 3
x = 3 + 1.2
x = 4.2