How many real solutions does f(r) = 2x? — 1 have, based on the graph?
(1 point)
• one real solution because the graph touches y-axis at y = -1
• two real solutions because the graph is symmetric about the y-axis
© no real solutions because the graphs neither touches nor crosses the x-axis
• one real solution because the graph intersects the y-axis once
The correct answer is: • one real solution because the graph intersects the y-axis once.
The graph of the equation f(r) = 2x - 1 is a straight line with a slope of 2 and y-intercept of -1. Since the slope is non-zero, the line will intersect the y-axis at one point, which corresponds to a real solution.