this is the question:
A is directly proportional to B²
When A=50, B=10
a) Find an equation connecting A and B.
the formula to start answering this question is
A (direct proportion sign) B²
A=K*B²
then you have to fill in the numbers for A and B² so you get this:
50=K*10²
50=K*100
so then you have to find out K so you have to do 50/100 which is 0.5 so K=0.5. THen you have to write the equation in full to get the full marks so it's just: A=0.5*B².
----------------------------------------
then you will have to put your formula in action so say that the question was:
b) find the value of B when A is 72
you would have to substitute the numbers is so that its : 72(A)=0.5(K)*B
so then you would have to divide 72 by 0.5 to get the answer which is 144. Then you have to remember to SQUARE ROOT 144 to get B becasue you have only got B², not just B. so the final answer is ... 12!
i hope this helped x
direct proportion: y=kx inverse proportion: y=k/x
when both increaes its direct proportion and when one increase and othe decreases its inverse proportion.
Direct Proportion Inverse Proportion Direct square Proportion Inverse Square Proportion Hope it helps :)
Yes it does rely on direct proportion.
direct proportion indirect proportion additive proportion partitive proportion
Which type of line shows a direct proportion
ambot
direct
the three kinds of proportions are indirect proportion, direct proportion and thepartitive proportion
If it is a straight line through the origin then it represents a direct proportion.
wow
Direct Proportion means that as one increases, the other also increases.Inverse proportion is the reciprocal of direct proportion. If something is in the direct proportion of 1:3, then the inversion proportion is 3:1.OrIndirect Proportion means that as one increases the other decreases, or one is directly proportional to 1 divided by the other. Example: Pressure is indirectly proportional to volume, or Pressure is directly proportional to 1/Volume.