Question

triangle jkl is rotated 270° counterclockwise about the origin to form triangle jkl. what is the y - coordinate of point j? type the answer in the box.

Explanation:

Step1: Identify rotation rule

The rule for a 270 - degree counter - clockwise rotation about the origin is $(x,y)\to(y, - x)$.

Step2: Determine coordinates of point J

From the graph, the coordinates of point J are $(-1,4)$.

Step3: Apply rotation rule

Using the rule $(x,y)\to(y, - x)$ with $x=-1$ and $y = 4$, we get $J'=(4,1)$. The y - coordinate of $J'$ is 1.

Answer:

1