The table below shows the scoring averages for the players on the Supersonics intramural basketball team last season. Age of Player
Scoring Average
19
2
14
8
16
6
18
10
15
12
10
15.5
17
6
11
4
14
2

Using the data from the table, choose which set of axes and which set of ordered pairs you would use to plot the data.
Graph A
A graph has age of player on the x-axis, and scoring average on the y-axis.
Graph B
A graph has scoring averages on the x-axis, and age of player on the y-axis.
Set A
(19, 2), (14, 8), (16, 6), (18, 10), (15, 12), (10, 15.5), (17, 6), (11, 4), (14, 2)
Set B
(2, 19), (8, 14), (6, 16), (10, 18), (12, 15), (15.5, 10), (6, 17), (4, 11), (2, 14)

a.
Graph B, Set A
b.
Graph B, Set B
c.
Graph A, Set A
d.
Graph A, Set B

Please select the best answer from the choices provided

A
B
C
D

C. Graph A, Set A

Step-by-step explanation:

(I took the test)

Your X axis is the age of players and the Y axis is the scoring average.

step-by-step explanation:

30% of $420 is 0.30($420) = $126 and $420 + $126 = $546.

or, 130% of $420 is 1.3($420) = $546.

notice that this is not the $600 original list price with which we started.

why doesn't this work?

the method does not work because 30% of $420 is not the same amount as the 30% of $600. it may seem obvious when stated this way, but it is a very common error made on problems of this type. we cannot just use the same percent and get back to the original amount because we are taking that percent of a different value.

to work problems of this type correctly, it is generally best to write an equation for the situation and then solve.

example: since (100% – 30%)(original price) = (sale price)

70% of the   (original price) is $420.

0.7x   = 420

equation image indicator

x = 600

the original cost was $600.

we may also solve this problem using the two-step method. working the problem in two steps requires us to use more algebra skills. we have to know that x = 1x (identity property of multiplicationtext annotation indicator) and that 1x – 0.3x = 0.7x (subtracting like terms). then we solve the problem as follows:

(original price) – 30%(original price) = sale price

x – 0.3x = 420

0.7x = $420

equation image indicator

x = 600

the original cost was $600.  

note that with both of the above methods we do obtain the correct original amount.

example: after a 5% pay raise, hermione is earning $22,680 per year. what was she earning before the pay raise?

105% of (original salary) = current salary

1.05x = 22,680

equation image indicator

x = 21,600

hermione earned $21,600 per year before the pay raise.

this is an example so maybe you will get how to at least do it!