Answer:
The equation that that represents number of pull ups
i can do after
weeks is
.
Step-by-step explanation:
Given:
Number of pull ups at the beginning = 5
Number of pull ups after 4 weeks = 9
We need to write the equation for number of pull ups
i can do after
weeks.
Solution:
Now we will find the number of pull ups increased in 4 weeks.
number of pull ups increased in 4 weeks can be calculated by Number of pull ups after 4 weeks minus Number of pull ups at the beginning.
framing in equation form we get;
number of pull ups increased in 4 weeks = 
So we can see that;
in 4 weeks = 4 pulls increase
in 1 week = Number of pull ups able to do in 1 week.
By using Unitary method we get;
Number of pull ups able to do in 1 week = 
Now we can say that;
Let the number of pull ups you can do
.
Let he number of weeks be
.
So we can say that;
number of pull ups you can do after 'x' weeks is equal to Number of pull ups at the beginning plus Number of pull ups able to do in 1 week multiplied by number of weeks.
framing in equation form we get;

Hence The equation that that represents number of pull ups
i can do after
weeks is
.