Question

A line includes the points (1, 9) and (0, 5). What is it’s equation in the slope-intercept form?

Answer 1

Equation is y = 4x + 5

Explanation:

• Step 1: Find the slope of the line by m = (y2 - y1)/(x2 - x1). Here y2 = 5, y1 = 9, x1 = 1 and x2 = 0

⇒ m = (5 - 9)/(0 - 1) = 4

• Step 2: Find y-intercept, b. Since the line passes through (0, 5) b = 5
• Step 3: Write the equation in slope-intercept form

⇒ y = 4x + 5