Question

Which of the following coordinate pairs is a point on the parabola y=−4x2−53x−56
?

Hint: Use Desmos Graphing Calculator

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(1 point)

(1, -100)

(-1, -7)

(2, 5)

(-2, 0)

Answer 1

Plug each x into y = −4x^2 − 53x − 56.

For x = −1: y = −4(1) − 53(−1) − 56 = −4 + 53 − 56 = −7.

So (−1, −7) lies on the parabola.