CAIE IGCSE Mathematics Extended E2.8 Proportion Topic Practice

$y=\frac{24}{(x+3)^2}$ oe final answer
M1 for $y=\frac{k}{(x+3)^2}$

0.16
M1 for $m=\frac{k}{(t+2)^2}$ oe or better
M1 for substituting their k into $m=\frac{\text{their }k}{(8+2)^2}$
or M2 for $0.64(3+2)^2=m(8+2)^2$ oe

$y=\frac{242}{(6 w+2)^{2}}$ oe final answer

M3 for $\frac{8(3.5+2)^{2}}{\left(\frac{90}{15} w+2\right)^{2}}$ may be done in stages or for correct answer seen then spoiled

OR

M2 for $y=\frac{242}{(x+2)^{2}}$

or $\mathbf{M 1}$ for $y=\frac{k}{(x+2)^{2}}$ oe or better

B1 for $w=\frac{x}{6}$ oe