Work out the percentage change when a price of £80 is increased to £100

25%

Step-by-step explanation:

100 - 80 = 20 (change)

change / original price X 100

20 / 80 = 0.25

0.25 X 100 = 25

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.