Use the Rectangular Coordinate System · Exercise 35

Weight of a baby Mackenzie recorded her baby’s weight every two months. The baby’s age, in months, and weight, in pounds, are listed in the table, and shown as an ordered pair in the third column.
ⓐ Plot the points on a coordinate grid.

$$\begin{array}{ccc}\text{Age}& \text{Weight}& \left(x,y\right)\\ 0& 7& \left(0,7\right)\\ 2& 11& \left(2,11\right)\\ 4& 15& \left(4,15\right)\\ 6& 16& \left(6,16\right)\\ 8& 19& \left(8,19\right)\\ 10& 20& \left(10,20\right)\\ 12& 21& \left(12,21\right)\end{array}$$
ⓑ Why is only Quadrant I needed?

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Prealgebra 2e · §11.1 Use the Rectangular Coordinate System · Exercise 35