Question

http://prntscr.com/djkmj7

Answer 1

@jim_thompson5910 please help me :)

Answer 2

Do you see how (0,15) is one point on the line?

Answer 3

yes

Answer 4

is the answer d or c?

Answer 5

let's ignore the answer choices for now

Answer 6

Do you see how (5,50) is another point on the line?

Answer 7

yes

Answer 8

so we have these two points (0,15) and (5,50)

what's the slope of the line through these points?

Answer 9

i dont know how to find the slope

Answer 10

Do you agree that the y coordinate of (0,15) is 15?

Answer 11

yes

Answer 12

what is the y coordinate of (5,50) ?

Answer 13

50

Answer 14

yes so going from 15 to 50 is a difference of what?

in other words, what is 50-15 equal to?

Answer 15

35

Answer 16

good

now we do the same for the x coordinates of the two points (0,15) and (5,50)

5-0 = 5

agreed?

Answer 17

yes

Answer 18

now we divide the two differences

(ydifference)/(xdifference) = 35/5 = 7

so the slope is 7

agreed?

Answer 19

yes

Answer 20

the slope is 7
so m = 7

the y intercept is 15 because this is where the line crosses the y axis
so b = 15

therefore y = mx+b turns into y = 7x+15

do you agree?

Answer 21

yes

Answer 22

so now we have the equation of that line

we want to know the possible value of y when x = 7
plug x = 7 into that equation to find y

y = 7*x + 15
y = 7*7 + 15 ... replace x with 7
y = ???

Answer 23

64 points!!

Answer 24

yep so the final answer is A

Answer 25

Keep in mind that this is a best guess. It's not the actual value. The line of best fit does its best to predict y values based on x.

Answer 26

ok :)

Answer 27

we took so long to answer this question.. lol

Answer 28

It's better to go the longer route to help you understand it fully

Answer 29

ok :)