I don't know if you still need help. but the answer is the first one.
Answer:
Cody made a mistake when calculating the slope of the line and this affected every other steps after than.
She divided -3 by 6 instead of -3 by 1/6
Step-by-step explanation:
Given


<em>See attached for steps</em>
Required
Explain Cody's error
<em>Cody made a mistake when calculating the slope of the line and this affected every other steps after than.</em>
See Proof
Slope (m) is calculated as thus:






This is in contrast to
, calculated by Cody
Solving further to determine the equation.

Where




Collect Like Terms



×

=

You then divide the numerator(top) by the denominator(bottom)

=

Your answer is