21) A tour bus holds 40 people. It charges $7 per ticket. The function representing the total sales is fx) = 7x, where x represents the number of tickets sold. What is the domain? A) X = all real numbers
B) x = all non-negative integers 280 or belowx = all non-negative integers 40 or below
C) x <=40
D)x = all non-negative integers 40 or below

is only a line? i think so

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation:

b. ol

step-by-step explanation:

i got the answer right on edg.

congruent: (geometry) (of figures) identical in form; coinciding exactly when superimposed.