Let's call the number of months that it takes Pablo to save $700 as "m". The amount of money Pablo has saved after "m" months can be represented by the equation:
y = 200 + 125m
where y is the total amount of money saved after "m" months.
To find the number of months it will take Pablo to save $700, we can set y equal to $700 and solve for m:
700 = 200 + 125m
500 = 125m
m = 500 / 125 = 4
So it will take Pablo 4 months to save $700.
The equation in slope-intercept form is:
y = 125m + 200
where m is the number of months and y is the total amount of money saved. The slope of the line is 125, which represents the amount added to the savings each month, and the y-intercept is 200, which represents the initial amount of money Pablo received for graduation.