Assuming that 
is the amount of hours spent doing homework:
Plug in
for
, 
That means that since a
value is the test score (because that's what the y-axis is labeled), your predicted test score is a 64.
Plug in
That means that since a
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We know that the equation of the line is in the form . To find b, we can use the fact that (6,-5) lies on the line, meaning that both sides of the equation are equal when x=6 and y=-5.
Hence, the equation of the line is , and its graph looks something like follows.
Answer:
D)
Step-by-step explanation:
A)
B)
C)
D)