Here’s How to Read It
To find the cost of a television when 225 televisions are sold, start at 225 on the vertical axis and draw a
horizontal line to the right until you hit a data point. Use the edge of your answer sheet as a straight-edge if
you have trouble drawing your own straight lines. Once you hit a point, draw a straight line down from it
to the horizontal axis and read the number the line hits, which should be $1,500. To determine the number
of televisions sold when they cost a certain amount, reverse the steps—start at the bottom, draw up until
you hit a point, then move left until you intersect the vertical axis.
Try the question now.
9.A certain store sells televisions ranging in price from $500 to $5,000 in increments of$500. The graph above shows the total number of televisions sold at each price during
the last 12 months. Approximately how much more revenue did the store collect from
the televisions it sold priced at $3,500 than it did from the televisions it sold priced at
$1,000 ?
A) $175,000
B) $250,000
C) $275,000
D) $350,000Here’s How to Crack It
The revenue is the cost of television × number of televisions sold. We need the information from the
graph only for the television that costs $3,500 and for the television that costs $1,000 in order to