Help me find the scale factor please

Step-by-step explanation:

Scale factor:

AC/DF: 15/18 = 5/6

AB/DE: 25/30= 5/6

the scale factor is 5/6 or 5:6

The scale factor is 6 : 5

Step-by-step explanation:  30/25 = 6/5 .  18/15 = 6/5    24/20 = 6/5

Each dimension of ΔABC was multiplied  by the factor 6/5 to get the dimensions ofΔDEF

youre gonna to the the cords (1,3) on a graph, and do a diagonal line that goes through the 0