Answer:
The linear equation
and Erin can pick
apples per hour if she maintains a constant rate.
Step-by-step explanation:
To find the linear equation of the relationship from the graph.
We have to find the coordinates .
Let say
and 
Here
variable is the time in hour and
variable is the number of apples.
To find linear equation we have to find the slope (m) of the line by using point-slope form.

So,

The the linear equation will be.

Number of apples Eric pick in an hour is
.
By plugging the value of
in the equation we can find the number of apples picked by Erin per hours subsequently
for second hour.
In each hour she picks
apples.
Linear equation is
and number of apples picked by Eric in an hour is
.