Question

David is walking. The number of calories he has burned varies directly with the number of minutes he has walked. See the graph below.

Answer 1

how many calories is david burning per minute
what is the slope of the graph

Answer 2

@ganeshie8

Answer 3

\[(80-0)\div (20-0) = slope \]
\[slope =4\]
the slope is 4, meaning david burns 4 calories per minute.

Answer 4

let m = the slope of the graph
\[m=(y2-y1)/(x2-x1)\]

from the graph
\[m=(60-20)/(15-5)\]
\[m=40/10\]
\[m=4\]
\[y=mx\]
the slope is 4 calories per minute
when x = 1 minute
\[y=4*1\]
\[y = 4\]
David is burning 4 calories per minute

Answer 5

@fatZak to me that is perfect explanation!

Answer 6

probably the only thing you did not do was interpret your result!

Answer 7

Look at the question again @fatZak

Answer 8

but other than that @fatZak its 100%