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

Question

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

igreen · Answer

Graph?

anonymous · Answer

no, thats all that they gave me

igreen · Answer

Ah, it wants to know which increase is linear.

alexandervonhumboldt2 · Answer

yeah

mathstudent55 · Answer

Notice that every choice has first, second, third month.

seb.cal · Answer

Please help me with my question...

anonymous · Answer

plug them into your calculater and use the stat calc linreg function to find the linear one

andrewishere · Answer

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.

andrewishere · Answer

Whichever answer choice shows such a graph, then that is the answer to your problem

anonymous · Answer

yea man
do the hotline bling

igreen · Answer

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.

adi3 · Answer

start with solving, if you cant then graph

adi3 · Answer

as @iGreen said

mathstudent55 · Answer

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.

anonymous · Answer

thank you @mathstudent55 for explaining it, m not that good at math..

anonymous · Answer

so it would be c