10)
we get the points from the table are (2,12) and (8,0).
Consider the line equation.

where b is the y=intercept.
Substitute x=2 and y=12, we get




Substitute x=8 and y=0 in the line equation, we get

Substitute m value in this equation to find the value of b.





Dividing both sides by 3, we get

Hence the y-intercept is 16.
11)
we get the points from the table are (2,-5) and (4,17).
Consider the liner function.

where b is the y-intercept.
Substitute x=2 and y=-5, we get




Substitute x=4 and y=17 in the equation, we get

Substitute the value of m in this equation to find the value of b.





Hence the y-intercept is -27.