In an ecosystem some animals get energy by eating plants. An elk can eat 20 pounds of plants each day. Write and evaluate an expression to find how many pounds of plants a herd of 18 elk can eat in one week.

step-by-step explanation:

step-by-step explanation:

; fx

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)