8) When two numbers are multiplied together, the product is the same regardless
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Let 
be the amount of parts the student answered correctly. Suppose that 
is a function between and the score of a student's project. As the student initially receives a fixed 
points for turning the project in and 
points for each correct part, the function is initially:
When the students receive
points for each correct part, the coefficient of changes, as the amount of points received per correct answer increases. Thus:
.
When the students receive
y = x + 3
The equation of a line in slope-intercept form is
y = mx + c ( m is the slope and c the y-intercept )
rearrange - 2x + 3y = 9 into this form
add 2x to both sides
3y = 2x + 9 ( divide all terms by 3 )
y = x + 3 ← in slope-intercept form