Answer:
A dilation maps (4;6) to (2;3). Under the same dilation, (-1;3) would be mapped to (-0.5;1.5).
Explanation:
From the example dilation case we notice in the mapped point a dilation factor of 0.5:
x: 4*0.5=2
y: 6*0.5=3
Appliyng the same dilation factor to the point (-1;3) we get:
x: -1*0.5=-0.5
y: 3*0.5=1.5