Please help, i checked other sites and people kept saying differnent things.
The sales totals at Robert's food store have increased linearly over the months. Which of these best shows the sales in the first three months?
A. $1200 in the first month, $1212 in the second month, $1224.12 in the third month
B. $1200 in the first month, $1236 in the second month, $1273.08 in the third month
C. $1200 in the first month, $1285.48 in the second month, $1370.96 in the third month
D. $1200 in the first month, $1224.28 in the second month, and $1248.48 in the third month
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Notice that every choice has first, second, third month.
Please help me with my question...
plug them into your calculater and use the stat calc linreg function to find the linear one
the key word is linear. So you will most likely have to graph this yourself,. A linear graph is a graph whose line is completely straight.
Whichever answer choice shows such a graph, then that is the answer to your problem
do the hotline bling
A. (1, 1200), (2, 1212), (3, 1224.12)
B. (1, 1200), (2, 1236), (3, 1273.08)
C. (1, 1200), (2, 1285.48), (3, 1370.96)
D. (1, 1200), (2, 1224.28), (3, 1248.48)
Find the slope between the points and see which one is the same throughout all 3 points.
start with solving, if you cant then graph
as @iGreen said
A linear increase means that for the same change in x, you get the same change in y.
For each choice, the changes in x you can see are 1 month changes, from the first month to the second month, and from the second month to the third month. The change in months is one month.
Do this for each choice:
Subtract month 1 sales from month 2 sales.
Subtract month 2 sales from months 3 sales.
Find the choice for which these two differences are the closest.
thank you @mathstudent55 for explaining it, m not that good at math..