Quiz Results

Quiz	Tangents to circles
Name	G i a c i n t a A s t o l f i
Email	G i a c i n t a . a s t o l f i @ g m a i l . c o m
Result	FAILED
Score	1 / 3 (33.3%)
Passing score	2.4
Quiz took	3 h 2 min 11 sec
Quiz finished at	2024-03-07 17:48:16

Responses

The circle in the diagram has the equation {x}^{2}+{y}^{2}=169\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}Work out the equation of the \mathrm{tan}gent to the circle at \left(-12,-5\right)

Awarded Points: 0

Correct Response: y = -\frac{12}{5}x-\frac{169}{5}

User Response: y = -\frac{5}{12}x-\frac{169}{5}

The circle in the diagram has the equation {x}^{2}+{y}^{2}=25\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}Work out the equation of the \mathrm{tan}gent to the circle at \left(4,3\right)

Awarded Points: 0

Correct Response: y = -\frac{4}{3}x+\frac{25}{3}

User Response: y = -\frac{3}{4}x+\frac{25}{3}

The circle in the diagram has the equation {x}^{2}+{y}^{2}=100\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}Work out the equation of the \mathrm{tan}gent to the circle at \left(-6,8\right)

Responses

Awarded Points: 0

Correct Response: y = -\frac{12}{5}x-\frac{169}{5}

User Response: y = -\frac{5}{12}x-\frac{169}{5}

Awarded Points: 0

Correct Response: y = -\frac{4}{3}x+\frac{25}{3}

User Response: y = -\frac{3}{4}x+\frac{25}{3}

Awarded Points: 1

Correct Response: y = \frac{3}{4}x+\frac{25}{2}

User Response: y = \frac{3}{4}x+\frac{25}{2}