This equation can be solved with two solutions, corresponding to 
and 
.
The graph shows the relationship between pounds of grapes, g, and their cost, c.
2 answers:
Step 1
Define variables:
x – cost in dollars
y – weight of grapes in pounds
We know that the relationship between x and y represents direct variation if it follows the form or
.
The line illustrated in the graph represents such a direct variation.
Determine the proportionality constant k.
– substitute coordinates of point B –>
The slope corresponds to the constant of proportionality.
Therefore,
The linear equation is .
Hence,
Answer to part (a):
You can obtain pounds of grapes per dollar spent.
Step 2
Calculate the cost per pound of grapes.
Let
Insert the value of g into the equation and solve for c.
Therefore,
Answer to part (b):
The price is for each pound of grapes.
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