Two gallons of gas cost $10.
1. complete the table.
2.how much does each gallon of gas cost

(1,4) is on graph of f(x)

f(1) = 4

so 1/4 f(x)

1/4 f(1)

1/4. ×4

1

so point for function 1/4. f(x) is (1,1)

table 3 represents a direct variation function. : )