Answer:
Answer is in the attached image.
Answer:

Step-by-step explanation:
An undefined slope is a vertical line on a graph. This means it isn't equal to a y-value, but rather an x-value instead. All values of y work for this function, just as long as the x-coordinate is 11.
Answer:
$8.25
Step-by-step explanation:
1.25+(2.25x2)+1.00+(1.25x2)=8.25
Yes, 8 is a solution to the equation
Are you trying write it into slope intercept form ?