Answer:
Is there a picture that goes with it?
This looks like scalar matrix multiplication. The idea here is to multiply the scalar 3 by each item inside the matrix.
Doing so leads to the answer [3 -12 15 -21]
Side note: I'm assuming the matrix given to you has 1 row and 4 columns.
Answer:
$5,300
Step-by-step explanation:
Formulae used,



Where,





Putting the values from the table, we get the best fit line as,

As we want to calculate the profit at 350 pounds, so putting x=350, we get

Answer:
3.9
Step-by-step explanation:
(76-62.10)÷3.55=3.91...
=3.9 (correct to nearest tenth)