Can someone me with this question it would be awesome

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

Point b lies between points a and c on . let x represent the length of segment ab in inches. use the segment to complete the statements. the value of x is . the length of in inches is . the length of in inches is .