The owner writes a line of best-fit equation, shown below, to model the relationship between profit earned and month. y = 2,500x - 2,500
Explain how you know that the line of the best-fit equation is appropriate, mentioning both the slope and y-intercept in your response.

Step-by-step explanation:

Given that the owner writes a line of best fit equation, shown below, to model the relationship between profit earned and month.  

The line of best fit is a line which is closer to all the points in the observation than any other line.

The deviations of observed points from the line when squared and added would be the least for this regression line.  That is why this method is also called least squares method.

Here slope = 2,500 and y intercept = 2500

Slope here shows the change in y when x increases by 1 unit.

i.e. rate of change of y with respect to x

y intercept is the value of y when x=0

your answer is a

step-by-step explanation:

4*4*4*4=256

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".