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If a line passes through the points (1, 1) and (2, 3), what is its equation in s
If a line passes through the points (1, 1) and (2, 3), what is its equation in slope-intercept form?
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Q1
If a line passes through the points (1, 1) and (2, 3), what is its equation in slope-intercept form?
y = 2x - 1
y = 3x - 2
y = 2x + 1
y = x + 2
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Slope m = (3 - 1) / (2 - 1) = 2. Using point-slope form: y - 1 = 2(x - 1) => y = 2x - 1.
Questions & Step-by-step Solutions
1 item
Q
Q: If a line passes through the points (1, 1) and (2, 3), what is its equation in slope-intercept form?
Solution:
Slope m = (3 - 1) / (2 - 1) = 2. Using point-slope form: y - 1 = 2(x - 1) => y = 2x - 1.
Steps: 9
Show Steps
Step 1: Identify the two points given: (1, 1) and (2, 3).
Step 2: Use the formula for slope (m) which is (y2 - y1) / (x2 - x1). Here, y2 = 3, y1 = 1, x2 = 2, and x1 = 1.
Step 3: Substitute the values into the slope formula: m = (3 - 1) / (2 - 1).
Step 4: Calculate the slope: m = 2 / 1 = 2.
Step 5: Now, use the point-slope form of the equation: y - y1 = m(x - x1). Here, use point (1, 1) and slope m = 2.
Step 6: Substitute the values into the point-slope form: y - 1 = 2(x - 1).
Step 7: Simplify the equation: y - 1 = 2x - 2.
Step 8: Add 1 to both sides to solve for y: y = 2x - 2 + 1.
Step 9: Finalize the equation: y = 2x - 1.
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