Need help asap!! When graphing the residual values, when do you know if a linear model is an appropriate model for your data? A. If the points in the residual plot are all in a straight line.
B. If the points in the residual plot are scattered.
C. If the points in the residual plot are all close to the horizontal axis.
D. If the points in the residual plot are all close to the vertical axis.

it is probably the graph on the bottom right.

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step-by-step explanation:

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he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".