Question

Dan buys pure silver to make jewelry. The graph shows the relationship between the amount of money Dan spent on pure silver and the silver’s weight.
What rate does the point (80, 56) represent?
A. $1/80g
B. $56/80g
C. $80/56g
D. $56/1g

Answer 1

B. $56/80g

The line going up is the price, the line going to the right is the weight in grams.

Answer 2

The answer is quite straightforward...

That's $56 per 80 grams.

($56)/(80g)

Explanation:

$\left( { x }_{ 1 },{ y }_{ 1 } \right) =\left( 0,0 \right) \\ \\ \left( { x }_{ 2 },{ y }_{ 2 } \right) =\left( 80,\quad 56 \right) \\ \\ \therefore \quad \frac { Rise }{ Run } =\frac { 56-0 }{ 80-0 } =\frac { 56 }{ 80 }$