Using matrix methods, how to find the image of the point (1,-2) for the transformations?: 1) a dilation of factor 3 from the x-axis 2) reflection in the x-axis
1 Answer
Jan 30, 2018
Explanation:
#(1)#
#"multiply the coordinates by the scale factor"#
#rArr((x'),(y'))=color(red)(3)((1),(-2))=((3),(-6))#
#rArr(1,-2)to(3,-6)#
#(2)#
#"multiply by the associated reflection matrix"#
#"for "color(blue)"reflection in the x-axis"#
#•color(white)(x)((1,0),(0,-1))#
#rArr((x'),(y'))=((1,0),(0,-1))((x),(y))#
#color(white)(xxxxxxx)=((1,0),(0,-1))((1),(-2))=((1),(2))#
#rArr(1,-2)to(1,2)#