Question

the table below shows the median selling price of houses in the 1990s. draw a scatter plot based on the data.

year	1990	1991	1992	1993	1994	1995	1996
price ($ thousands)	130	135	122	145	151	139	61

a.
b.
c.
d.

Explanation:

Step1: Identify x and y values

x: years (1990 - 1996), y: prices in thousands

Step2: Analyze y - axis range

Option a has appropriate y - axis range for our data.

Step3: Plot points

Plot (1990, 130), (1991, 135), etc. and match with options.

Step4: Eliminate incorrect options

Options c has wrong y - axis range, b and d are incomplete.

Answer:

We need to plot points where the x - coordinate represents the year and the y - coordinate represents the price.
For 1990, the price is 130 (thousands), for 1991 it is 135 (thousands), for 1992 it is 122 (thousands), for 1993 it is 145 (thousands), for 1994 it is 151 (thousands), for 1995 it is 139 (thousands) and for 1996 it is 61 (thousands).
Looking at the scatter - plots:

• In option a:
• The y - axis range seems appropriate as the prices are mostly in the range of 60 - 160 (thousands).
• When we plot the points (1990, 130), (1991, 135), (1992, 122), (1993, 145), (1994, 151), (1995, 139), (1996, 61) on a scatter - plot, it matches the pattern in option a.
• In option c: The y - axis range is from 60 - 330 which is too large for our data set as most of our prices are below 160 (except for the outlier 61).
• Option b and d are not complete scatter - plots.

So the correct scatter - plot is a.