Answer:See belowStep-by-step explanation:a. f(x) = 2x + 6x + 1b. f(x) = cc. f(x) = x-x-6Assuming the functions are written correctly, let's analyze each, using the simpler y instead of f(x):a. y = 2x + 6x + 1 can be simplified to y = 8x + 1. This will be a straight line with a slope of 8 and a y-intercept of 1. This straight line will rise steeply as x increases.b. y = c, where c is a constant, will be a horizontal straight line that intersects the y axis at c.c. This equation simplifies to y = -6. This will be another horizontal straight line that intersects the y axis at -6.We can graph a and c, but since b does not have a number assigned to c, we don't know exactly where the line should be placed. For the purposes of the graph, let's assume c = 6. The equation becomes y = 6.See the attached graph.