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Transformations — Free MYP5 Mathematics (Standard) Practice Questions
1QuestionReflectionsConcept Practice
4 marks~6 minCriterion A
A graphic designer is creating a symmetrical logo using triangle ABC with vertices A(0,0), B(2,3), and C(4,1). The triangle is reflected over the line x=2 to produce triangle A′B′C′, which forms the mirror half of the logo.
a
Deduce the coordinate rule for reflecting any point (x,y) over the line x=2. [1]
b
Determine the coordinates of A′, B′, and C′. [2]
c
The designer claims the combined shape of triangle ABC and triangle A′B′C′ is perfectly symmetrical about x=2. Justify whether this claim is correct. [1]
Solutions
2QuestionStretch/compressionAssessment Practice
6 marks~9 minCriterion D
A graphic designer is resizing a logo for a billboard and a business card. The logo's outline is defined by vertices A(2,1), B(6,1), C(7,4), and D(1,4). The designer applies a vertical stretch by factor 2.5, followed by a horizontal compression by factor 0.4.
a
Determine the coordinates of the transformed vertices A′, B′, C′, and D′ after both transformations are applied in the given order. [2]
b
Calculate the area of the original logo and the area of the transformed logo. Show that the two areas are equal, and explain why this result occurs. [2]
c
Advise the designer whether this transformation is suitable for both media, justifying your answer with reference to the effect of non-uniform scaling on the logo's proportions and the significance of the equal-area result. [2]
Solutions
3QuestionReflectionsConcept Practice
2 marks~3 minCriterion B
A graphic designer uses coordinate geometry to create a reflected logo. The original logo contains the point P(3,−5). The designer reflects the entire logo across the x-axis, as shown by the pattern below.
(2,3)→(2,−3)
(−1,5)→(−1,−5)
(4,−2)→(4,2)
Deduce the general rule for reflecting any point (x,y) across the x-axis. [1]
State the image of P(3,−5) after reflection across the x-axis. [1]
Solutions
4QuestionStretch/compressionAssessment Practice
4 marks~6 minCriterion C
A sports analyst models the vertical height (in metres) of a ball's bounce using the function f(x)=x2, where x is time in seconds. A new surface increases all heights by a factor of 3 and reduces the launch height by 2 metres, giving a transformed function g(x).
a
Deduce the equation of g(x). [1]
b
Calculate g(4). [1]
c
The analyst claims: "At x=4 seconds, the ball reaches a height above 50 metres, so the surface is unsuitable for regulation play." Advise the analyst whether this conclusion is supported by the model. [2]