Plsss Help ASAP!! I really need help with this.

hm let me think hm think think hm think yes

answer: 8

step-by-step explanation:

x:       y:  

-1         4

0         4

1         6

2         18

3         20  

step-by-step explanation:

total income = price of one ticket   *   number of tickets sold

  y                 =     4                                   x

so the equation is y=4x     with x≥0   because number of tickets sold can not be negative

thus the equation is a semi -line with an end point at

(0,0)

passing through :

x=1     y=4(1) = 4   so through (1,4)