Question

The graph shows the quantity of flour a baker uses to bake cakes.
The baker will need ______ cups of flour to bake a single cake.

• A. 2
• B. 6
• C. 3
• D. 1

Answer 1

The correct option is C 3


To find the required values from the graph, draw a perpendicular line parallel to the $y-$axis from $1$ on the $x-$axis.
The point where this line meets the given line gives the amount of flour.
Here, the point $(1,3)$ is $3$ units from the $x-$axis and $1$ unit from the $y-$axis.
Hence,
$(1,r)=(1,3)$
$r=3$
The baker will need $3$ cups of flour to bake a single cake.

$\text{Alternate method:}$
The unit rate of the graph gives the number of cups of flour needed to bake a single cake
$=\frac{9-6}{3-2}=3$
So, the baker will need 3 cups of flour to bake a single cake.