Question

thursday

1. determine if the following dilations will result in an enlargement or a reduction.

a. (x,y)→(3x,3y)
b. (x,y)→(.2x,.2y)
c. (x,y)→(\frac{5}{2}x,\frac{5}{2}y)
d. x,y)→(\frac{1}{3}x,\frac{1}{3}y)
friday
current grade in hac: ______ %
my grade on unit 1 test: ______ %
my goal for 1st six - weeks: ______ %

of zeroes this six - weeks: ______

i need to retest? yes/no
i am on track with meeting my go

Explanation:

Step1: Recall dilation rule

If scale - factor $k>1$, it's an enlargement; if $0 < k<1$, it's a reduction.

Step2: Analyze a

For $(x,y)\to(3x,3y)$, $k = 3>1$, so it's an enlargement.

Step3: Analyze b

For $(x,y)\to(0.2x,0.2y)$, $k = 0.2<1$, so it's a reduction.

Step4: Analyze c

For $(x,y)\to(\frac{5}{2}x,\frac{5}{2}y)$, $k=\frac{5}{2}>1$, so it's an enlargement.

Step5: Analyze d

For $(x,y)\to(\frac{1}{3}x,\frac{1}{3}y)$, $k=\frac{1}{3}<1$, so it's a reduction.

Answer:

a. Enlargement
b. Reduction
c. Enlargement
d. Reduction