Maria willdo 61 sit-ups on Day 12
Step-by-step explanation
the table represents a linear function so, we can find the equation of the function and then evaluate for day 12
the equation of a line is given by:

so
Step 1
find the slope of the line
the slope of a line is given by.

let
P1(1,17)
P2(4,29)
now, replace

Step 2
now,find the equation of the line,use the slope-point formula

now, replace

so,the equation of the lines is
y= 4x+13
Step 3
finally, evaluate for day 12, it is x= 12
so,replace

it means Maria will do 61 sit-ups on Day 12
I hope this helps you