<span>The following indicate that a linear model is not the best fit for a dataset:
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• Scatterplot shows a curve pattern.
• Residual plot shows no pattern.
• Correlation coefficient is close to 1 or –1.
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Estimate 189 to the nearest tenth which would be 190. And then do the same for 643 which would be 640. 640-190= 450
Misha would combine 3x-2x and-8-7
Answer:c
Step-by-step explanation:
Given

and 
m of n is given by replacing x in
by x-3

can take any value of x except x=4 because at x=4 function is not defined
and
is also not defined for x=4 and can take any value of x