Question 1152983

two triangles are similar, so corresponding sides are proportional

take a look at bases: 

the length of the base of greater triangle is the distance from {{{-9}}} to {{{9}}}=> the length is {{{18}}}
the length of the base of smaller image  is the distance from {{{-8}}} to {{{2}}}=> the length is {{{6}}}

so, the base of greater triangle to  the base of smaller image is {{{18/6=3}}}

The scale factor is{{{3}}}

answer: b. {{{3}}}