Question

Choose the system of equations that matches the following graph: picture of coordinate plane with line y equals 1 over 4 x plus 1 and line y equals negative 3 over 4 x plus 9. They intersect at 8, 3 (6 points)

a. x − 4y = −4
3x + 4y = 36

b. x + 4y = −4
3x − 4y = 36

c. x + 4y = −4
3x + 4y = 36

d. x − 4y = −4
3x − 4y = 36

Answer 1

y = 1/4x + 1
-1/4x + y = 1
x - 4y = -4 <=====

y = -3/4x + 9
3/4x + y = 9
3x + 4y = 36 <=====

1/4x + 1 = -3/4x + 9
1/4x + 3/4x = 9 - 1
x = 8

y = 1/4x + 1
y = 1/4(8) + 1
y = 2 + 1
y = 3

solution is : (8,3)

and ur answer is : A

Answer 2

a. is the answer.  Solve for y in each case and match the words to the formulas