Based on these, credit for specific aspects of performance should be assigned as follows:

Transcription

1 Party Flags: Grade 9 Section The ce elements of perfmance required by this task are: find sizes by interpreting a diagram express a function by a fmula Based on these, credit f specific aspects of perfmance should be assigned as follows: Gives crect answers as: The sides of each flag measure 0 cm. The space between flags measures 0 cm. Shows crect wk such as: Visual approach: To find the space attempts to subtract two 80s from 0 To find the sides when the space is known, attempts to calculate (80 0). Algebraic approach: Equations fmulated: f + g = 80 f + 5g = 0 Uses a crect method f finding unknowns Uses guess and check with verification on both lines of flags. 4 Gives a crect answer as: 0n + 0(n-) = 0n-0 Accept an equivalent verbal rule. Shows that n flags = 0 n (n ) gaps = 0(n ) Shows that n flags = 0 n () ft () () Points MARS 000 Page Fm 9A

2 Trapezoidal Numbers: Grade 9 Section The ce elements of perfmance required by this task are: extend and check a given pattern use values in a table to derive a fmula Based on these, credit f specific aspects of perfmance should be assigned as follows:. Gives crect answer as: 9 dots. Gives a crect drawing of 4th number.. Gives crect answer as: trapezoidal number 4 5 number of dots Four crect values. Three two crect values point (9 has already been credited.) Allow marks if increct answers given in questions is used provided the differences between the numbers of dots increase by each time Gives a crect explanation such as: There is me row each time with me dot in it. The number of dots in the last row is equal to the trapezoidal number + ( equivalent) 4. Gives crect answer as: 0 5. Crectly plots the 4 crect values crectly plots their 4 values given in the table. Partial Credit Award point f plotting crect values () Joins with a curve. Gives crect answer as: 5. Accept any crect reading from their graph. Gives crect answer as: D = T ( T + ) equivalent. Points MARS 000 Page Fm 9A

3 Airplanes: Grade 9 Section The ce elements of perfmance required by this task are: plot a scatter graph to compare data use the scatter graph to estimate values Based on these, credit f specific aspects of perfmance should be assigned as follows:. Crectly plots the remaining. Award point f, 4, 5 values crectly plotted (). Crectly identifies the point representing the Swift.. Draws a straight line with a positive slope through the center of the. 4. Gives a crect description such as: The graph shows that the higher the maximum speed of a plane the higher the climb rate will be. Accept equivalent descriptions. 5. Finds that the maximum speed using a crect reading from their graph. Gives a crect explanation such as: Find the climb rate of 900 ft/min on the vertical axis. Go across the graph along the 900 ft/min value until the straight line is reached and then read off the value on the max speed axis. Points MARS 000 Page Fm 9A

4 Magic Pentagon Section The ce elements of perfmance required by this task are: fm and solve an equation Based on these, credit f specific aspects of perfmance should be assigned as follows: Completes the given magic pentagon. All three numbers crect. Sce point f one two answers crect Magic = 0 8 () a Gives crect answer as: E = 0 - x x - 4 equivalent to either expression D = x - - x equivalent to either expression b c Gives a crect equation fmed by equating two expressions f D E. E.g. 0 x = x - 4 ( equivalent) x = - x A x = Crect completion of the magic pentagon, as shown. The other four numbers crect:. Three two answers crect: point. B () C D Points Magic = E MARS 000 Page 4 Fm 9A

5 B's: Grade 9 The ce elements of perfmance required by this task are: apply rules f circumference and area of circles Based on these, credit f specific aspects of perfmance should be assigned as follows Gives crect answer as: length of wire is approx.9 cm. Accept cm (5 +.5π) cm Explains that: The length of the straight piece of wire is + = 5 cm. section Explains that: The length of wire f the two semicircle is π x + π x.5 = approx.9 cm. Accept 8 cm.5π cm Allow extra point if crect units are indicated f at least one crect value. Gives crect answers as: The area of the small semicircle is approx. cm o.5π cm The area of the large semicircle is approx.5 cm.5π cm 4 Allow extra point if crect units are indicated f at least one crect value. Points MARS 000 Page 5 Fm 9A