Answer:
(A) Scatterplot
Step-by-step explanation:
The most helpful visualization to spot outliers would be a scatterplot.
When collecting data on a scatterplot, you can see how the results are similar and which areas have the most answers and such.
There can be multiply outliers on a scatterplot, and they stand out because while most answers will be clumped together, the outliers will not.
X^2 + 12x + n
x^2 + 12x + (12/2)^2
x^2 + 12x + 6^2
n = 36
(x + 6)^2 will give you a perfect square.
There are two solutions.
.. (3, 2)
.. (0.2, -3.6)
_____
If you're choosing possibilities from a list, trying them in the equations usually gives quick results.
-7x -7y = 21
Y = 6
Since they are giving you the value of 6 you just plug it in the equation
-7x - 7(6) = 21
-7x - 42 = 21
+ 42. +42
-7x = 63
/-7. /-7
X = -9