Question

The sales totals at Robert's food store have increased linearly over the month. Which of these best shows the sales in the first three months?

Answer 1

Hi, welcome to open study!

Answer 2

(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

Answer 3

lol i was here on openstudy for like many months

Answer 4

I think the answer is C because there is a constant difference of $24.28

Answer 5

When the question says that the sales increased linearly, it means that sales will increase the same amount for each increase in time

Answer 6

sorry, said you were new here. haha

Answer 7

oh linear algebra. lol ok

Answer 8

its alright lol

Answer 9

Right, the answer here would be the one that increased the same amount from month to month

Answer 10

the increase per month would be the slope of the line

Answer 11

Thanks for clarifying :)

Answer 12

welcom.. anytime it is linear, think of a line and a slope, the increase per unit is the same...

y = k*x ---y is some constant times the x value

Answer 13

okay i'll remember and i know that equation too. i've seen that everywhere

Answer 14

yeah, y=k*x is the probs where they say y is directly proportional to x.

the only difference between y = k*x and y=m*x + b, is
y=k*x always goes through the origin, where as y=mx+b can intercept the y-axis anyehere at b.

Answer 15

any line is a y=k*x direct proportion, the direct proportion is the slope

Answer 16

alright got it

Answer 17

Please close this post if you're done.
Thanks! :D