An easy this to do is use desmos... an online graphing site that will allow you to graph the curves and points...
https://www.desmos.com/calculator
The alternate method is to subsitute each point into each equations...
I just did (-2, 2) into A... that point is not on the curve.. that would be the hard way. Subsituting x = -2 y = 18 so (-2, 2) isn't on the curve.
so eliminate A
repeat the process with B etc is (-2, 2) in on the curve, then select the next point and check.
That's why graphing is easier
Answer:
Step-by-step explanation:
The time is inversely related to the number of people working so that as the number of people working increases, the time required decreases
t = k p
divide both sides by p
t/p =k
Answer:
If y varies inversely as x, then we write it as:
y = k/x
where k is some constant.
If we multiply both sides of this equation by x we get an equation for k:
k = x*y
We are given that y=4 when x=7, therefore:
k = 7*4 = 28
Put this back into our original equation to get:
y = 28/x
t/3 is your expression.
feel free to add me as a friend as I am very good at math.
