Over here I followed the Soln using Weighted Average method but how wud we recognize that its a weighted average sum

I though I would substitute some values and check it out

Over here shud I check the graph value for each option. Wudnt that be too time consuming?

How is C correct?

I am confused abt 2007 and 2008 dollar amt ?

Is there any other approach for these problems?

Because the number of employees in Department X and Y aren’t the same, so the weighing cannot be the same either.

I don’t think that would be *too* time-consuming.

Alternatively, use reasoning. For example, can C and D *ever* intersect the graph (you may want to try this on Desmos)?

1.12 \times 1.05 > 1.17

?

1.12 × 1.05 > 1.17

Cud u explain this?

The dollar amount of 2007 would be X

*1.17 and for 2008 X*1.25?

@Leaderboard

Let x be the dollar amount for store R in 2006.

In 2007, this is (1.05 \times x), as there is a 5% increase.

In 2008, there is a 12% increase on 2007 levels, that is, (1.12 \times (1.05 \times x)).

No, it would be 1.17x and (0.92)(1.17)x. It’s reducing, not increasing.