Find the y-intercept of the line passing through the points (2, 5) and (4, 9).
Answer: A
First, find the slope (m) of the line.
m = \(\frac{9-5}{4-2} = \frac{4}{2} = 2\).
Now use the point-slope form with one of the points, say (2, 5):
y - 5 = 2(x - 2)
y - 5 = 2x - 4
y = 2x + 1.
This is in the slope-intercept form y = mx + c. The y-intercept (c) is 1.