Aproportional relationship is formed when y=1 and x=-4 what is the value of x when y=4

x = - 16

Step-by-step explanation:

The equation relating two proportional quantities is

y = kx ← k is the constant of proportionality

To find k use the condition when y = 1, x = - 4

k = = -

y = - x ← equation of proportionality

when y = 4, then

4 = - x (multiply both sides by - 4 )

x = - 16

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.