Answer:
2.5 pounds per year
Step-by-step explanation:
In this situation, we're looking at a linear change and a graph, and as such we'll just need to find the slope as in a linear graph that tells us how much the change is between two points and will be our rate here.
1 - Get your variables laid out
Because we're looking for a per year rate, its weight/year and thus because we need to find the change in y over the change in x then:
x = Years
y = Weight
2 - Find the slope
[tex]Slope = m = \frac{rise}{run} = \frac{change~in~y}{change~in~x} = \frac{y_2-y_1}{x_2-x_1} = \frac{175-145}{2018-2006} = \frac{30}{12}[/tex]
3 - Find the rate of change
Sallys dog gained 30 pounds over 12 years. The rate of change is pounds/year which is 30/12
30/12 = 2.5 pounds per year
Hope this helps :)
