Coordinates & Graphs: Medium Test 8

15 questions · 15 minutes

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What are the coordinates of the centre of this square?
Every point of a shape is moved by the rule (x, y) → (x, −y). Which transformation does this rule describe?
A triangle has corners at (1, 1), (3, 1) and (1, 4). Every coordinate is then multiplied by 2. What is the area of the new triangle, in squares?
The two triangles on the grid are reflections of one another. What is the equation of the mirror line?
A rectangle has corners at (−3, −2), (5, −2), (5, 4) and (−3, 4). What is its perimeter, in units?

When completing a rectangle, plot the three given points first. The fourth is then obvious from the shape rather than from calculation.
On a conversion graph, draw a faint line across from the axis and down to the other. Reading by eye alone invites error.