Question

Solve the system of equations graphically. You can use your graphing calculator!

y=−2x−1

3x − y =−7

(1 point)
Responses

Solution is (-1, -1)
Image without description Solution is (-1, -1)

Solution is (-1.5, 0)
Image without description Solution is (-1.5, 0)

Solution is (-1.6, 2.2 )
Image without description Solution is (-1.6, 2.2 )

Solution is (0, 2)
Image without description Solution is (0, 2)

Answer 1

Substitute y = −2x − 1 into 3x − y = −7:

3x − (−2x − 1) = −7
3x + 2x + 1 = −7
5x + 1 = −7
5x = −8 → x = −8/5 = −1.6

y = −2(−1.6) − 1 = 3.2 − 1 = 2.2

Solution: (−1.6, 2.2).