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The following graph shows the quantity of pencil sales (s) with respect to the day in August (d) in various office supply stores. Which of the following is most likely to be the equation of the trend line?
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Answer 1

@imqwerty

Answer 2

do you know "slope"?

Answer 3

yea

Answer 4

so if you are given the equation of a line y=mx +c, can you recognize what its slope is?

Answer 5

the slope would be m

Answer 6

yep, now what you have to do is : that the four options are in the form y=mx +c, except you have "s" instead of y, and "d" instead of x

Answer 7

so re-arrange the equations till you get them in y=mx +c form

Answer 8

with me so far?

Answer 9

yes but you put + its meant to be - there is no + in the answers given

Answer 10

think of it this way: the varibles m and c can be positve or negative,
so you might get y=mx +c or y=-mx-c or y=mx-c too

Answer 11

if you have got y= -mx + c it just means that the slope is a negative number

Answer 12

making sense?

Answer 13

so the final answer would be c?

Answer 14

you mean the third option? for the first question... no

Answer 15

so its the last option?

Answer 16

yep

Answer 17

ok and any idea on the second one?

Answer 18

@hartnn