49.5 is the answer because 66% equals 2/3.
We observe that the relationship between the variables is linear.
Therefore, we look for an equation of the form:
Where,
m: slope of the line
b ': intersection with the y axis
a: independent variable
b: dependent variable
The value of b 'occurs when a = 0.
We have then:
(See table)
Then, the value of the slope is found using the following formula:
Substituting values:
Rewriting:
Thus, the linear equation is:
Rewriting:
Answer:
The equation is:
C.) 3a-b=10