Question

question inside! Fan and medal!!!

Answer 1

Answers:
She drew the line of best fit incorrectly.
She used the line of best fit to predict y for an incorrect value of x.
She forgot the minus sign before the first term on the right side of the equation when she predicted y.
She plugged 0.5 into the equation for y instead of x and actually predicted x instead of y.

Question attached

Answer 2

\[y=-1.02x+7.09\]
Subbing in x as 0.5
\[y=-1.02(0.5)+7.09\]
Therefore, \[y=6.49\]

Based on this answer, can you tell which option would be the correct choice?

Answer 3

it's either a or b? I am going to say b

Answer 4

Is this correct?

Answer 5

The correct answer would be 'b'.

-"She forgot the minus sign before the first term on the right side of the equation when she predicted y."

If you solve for y by by ignoring the minus sign, that's when you get 7.6.

So the mistake was ignoring the minus sign in front of the gradient.

Answer 6

The correct answer should have been 6.49

Answer 7

Okay, thanks! Can I tag you with one more question?

Answer 8

Yes, surely!