28- 38-
Work out the percentage change to 2
decimal places when a price of £200 is
increased to £210.99.
%

5.495%

Step-by-step explanation:

Find the percent change by dividing the difference in prices by the original price, then multiplying it by 100

(10.99 / 200) x 100

0.05495 x 100

= 5.495

So, the percent change is 5.495%

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.