Checking and securing understanding of plotting coordinates with technology | Maths

Starter quiz

The vertical and horizontal lines that divide our coordinate grid into the four quadrants are called ...

axes ✓

grid lines

parallel lines
Which of these is a correctly formatted coordinate?

$2,7$

$(2/7)$

$2:7$

$(2$ $7)$

$(2, 7)$ ✓
Which of these coordinates fits the rule "The $y$ coordinate is five times the $x$ coordinate minus $1$ ?

$(0, 1)$

$(0, −1)$ ✓

$(5, 4)$

$(5, 24)$ ✓

$(5, −1)$
Which arithmetic sequence is represented by this table of values?

$n+7$

$7n+7$

$7(n+7)$

$7n$ ✓
Arithmetic sequences have which features?

A constant difference between terms. ✓

They form a straight line when plotted. ✓

They form a curve when plotted.

Increasing values.
Which relationship is represented by this table of values?

$y=6−2x$ ✓

$y=x−2$

$y=2x−6$

$y=8−2x$

Which words describe this plotted sequence?

linear ✓

arithmetic ✓

increasing

decreasing ✓

quadratic
Why did the software not plot the coordinate $(3, 5)$ in this image?

Because $3$ and $5$ aren't labelled on the $x$ and $y$ axes.

The scale on the axes is wrong.

We are zoomed in on the wrong region of the graph to see it.

You have to write the coordinate pair in brackets. ✓
Which arithmetic sequence is represented here?

$n$

$−2n$

$5−2n$

$7−2n$ ✓
How do we know that $(2,−3)$ does not follow the same linear rule as the other coordinates?

It's in the wrong quadrant.

It's plotted wrong.

It doesn't align with the other coordinates. ✓

Because the $y$ coordinate is less than the $x$ coordinate.
Which term is incorrect in this arithmetic sequence?

The $1^{\text{st}}$ one

The $3^{\text{rd}}$ one

The $5^{\text{th}}$ one ✓

The $7^{\text{th}}$ one
Which coordinate fits both of the rules $y=8−x$ and $y=3x−4$ ?

$(0, 8)$

$(8, 0)$

$(3, 5)$ ✓

$(5, 3)$

No coordinate fits both rules.

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When plotting the sequence $3n-1$ using technology you need to type each coordinate individually.

"We use technology to make things easier. There must be a quicker way!" Look for the 'table' function.

Arithmetic (linear) sequence - A sequence where the difference between successive terms is a constant.