Given the system x + 7y = 10 3x-7y=50

What is the solution to this system? How did you find it? With substitution or by graphing?
Complete each statement below.

The solution to this system is (3 points, +2 for exact answer)

I found the solution by (3 points for complete sentence).

Complete the table of values for the two equations (5 points, +2 for exact answers)
I give you one value of x, you pick 4 others. Substitute into each equation and find the value for y. Round your answers to the nearest tenth or give the exact value in improper fraction form.
Value of x: x+7y=10 3x-7y=50

0

From the table

Which points are y-intercepts? (3 points)

How do you know? Answer in a complete sentence. (2 points )