Answer:
B. This relationship represents a function because no length of ribbon has more than one price.
Step-by-step explanation:
A relation is considered as a function when there is exactly just one possible range value that any of the domain value can give. In order words, each domain value of a function cannot have more than one range value.
In the given table of values representing the length and price of ribbon, the domain includes all the set of lengths of the ribbon while the range is the set of the corresponding prices the lengths can cost.
Thus, each length given has exactly just one price. No particular length has more than one price. Therefore, we can consider this as a function.
I'm pretty sure it is associative, but i haven't studied this in yearsss. <span />
Answer:
Perpendicular means that,second gradient equals to first one as:
So,conducting the second equation to the form y=mx+c: 3y= -2x-5
So it's gradient is
converting to
equals to 1.5 or at least
Y find the equation of the first line you've got to use the formula: y-y1=m (x-x1)
y-1=1.5 (x+6)
y-1=1.5x+9
<u>y</u><u>=</u><u>1</u><u>.</u><u>5x</u><u>+</u><u>10</u><u> </u>is the equation of the first line.
Inverse variation means y=k/x (direct variation is y=kx) so we can use the info given to find the constant k
y=k/x
6=k/900
k=6(900)
k=5400 so the equation is:
y=5400/x or more accurately for this problem
t(v)=5400/v then:
t(800)=5400/800
t(800)=6.75 hours