Question

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

Hint: Use Desmos Graphing Calculator

(1 point)

(-1, -7)

(-4, -56)

(-4, 220)

(-1, 13)

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. The other choices do not.