VARIATION
Arlette Ramosにより
1. if y varies directly as x and y =30 when x=15.find y if x =50
1.1. y/x=k
1.2. 30/15=2=k
1.3. y=kx;then
1.4. y=2x50
1.5. y=50
2. the effect on the circumference if the radius is doubled, the circumference is skso doubled
2.1. if r us tripled what do you think will happen to the circumference?
3. the curcumferencevof a circle varies as its radius. what is the effectvon the circumference ifvthe ratio is doubled?
3.1. c=kr
3.2. k=2pi
3.3. if the rafius is doubled then,
3.4. C=2pi2r
3.5. C=4pir
3.6. thus:4pir/2pir=2
4. Direct varition
4.1. a direct variation is a type of relationship between quantities that describes an increase-.increase or decrease-decease trend between cariables
5. y is directly proportional to
6. expressed as
6.1. y varies as
6.2. y/x= k
6.3. y varies directly as
6.4. y/x=y1/x1=y2/x2=k
6.5. it is express as as a ratio, where this ratio is describe to be constant within the relationship.