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| 1 | |
Find the y-intercept of y = 0.2 (x + 1.5)2 - 1. |
| | A) | -1.5 |
| | B) | -1 |
| | C) | -0.55 |
| | D) | 1.5 |
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| 2 | |
Find the x-intercepts of y = 3 (x + 2)2 - 3. |
| | A) | -3 |
| | B) | -1 |
| | C) | Both of the above. |
| | D) | Neither -3 nor -1 |
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| 3 | |
Calvin is on a rollercoaster whose first few metres of track can be modelled by the equation <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0070780846/506629/image006.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]>, where x and y are distances measured horizontally and vertically in metres from Calvin’s starting point. How high (or low) will Calvin be when he has travelled 15 m horizontally from his starting point? |
| | A) | 17.5 m below his starting point. |
| | B) | 17.5 m above his starting point |
| | C) | 20 m below his starting point. |
| | D) | 40 m below his starting point. |
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| 4 | |
A parabola passing through the origin is 10 cm wide and 20 cm deep. Its equation could be: |
| | A) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0070780846/506629/image008.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
| | B) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0070780846/506629/image010.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
| | C) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0070780846/506629/image012.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
| | D) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0070780846/506629/image014.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| 5 | |
The sales of a new CD can be modelled by the equation S = - (d - 75)2 + 15625, where S represents sales in CD’s and d > 0 represents days from the time of the CD’s release.
How many days after its release will the CD stop selling? |
| | A) | -50 |
| | B) | 50 |
| | C) | 75 |
| | D) | 200 |
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