Question

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

y=−2x−1
𝑦
=
−
2
𝑥
−
1

3x − y =−7
3
𝑥

−

𝑦

=
−
7

(1 point)
Responses

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)

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

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

Solve by substituting y from the first into the second:
3x − (−2x − 1) = −7 → 3x + 2x + 1 = −7 → 5x = −8 → x = −8/5 = −1.6.
Then y = −2(−1.6) − 1 = 3.2 − 1 = 2.2.

Solution: (−1.6, 2.2).