Determine What Signs on Values of X and Y Would $\mathrm { H }$

Determine what signs on values of x and y would make the statement true. Assume that x and y are not 0.
-If a rock falls from a height of 70 meters above the ground, the height $\mathrm { H }$ (in meters) after $x$ seconds can be approximated using the formula $\mathrm { H } = 70 - 4.9 \mathrm { x } ^ { 2 }$ . What is the height of the rock after 2 seconds?

A) $60.2 \mathrm {~m}$
B) $50.4 \mathrm {~m}$
C) $260.4 \mathrm {~m}$
D) $- 26.04 \mathrm {~m}$