If the point (a, b) exists on the graph of y=f(x), what restriction(s) would have to be present? a. a>0&b>0 b. a≥0 & b≥0 c. b.≥0 d. b>0.

If r is an x-intercept of the graph of y=f(x), what is an x-intercept of the graph of each of the following? a. y=f(x) b. y=f(x) c. y=f(x)

If b is the y-intercept of the graph of y=f(x), what is the y-intercept of the graph of each of the following? a. y=f(x) b. y=f(x) c. y=f(x)