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Which of the following equations represents a line that passes through the points 
(4,-8) and 
(0,-5) ?
I. 
3x+4y=-20
II. 
y+2=-(3)/(4)(x+4)
Neither
I only
II only
I and II

Which of the following equations represents a line that passes through the points (4,8) (4,-8) and (0,5) (0,-5) ?\newlineI. 3x+4y=20 3 x+4 y=-20 \newlineII. y+2=34(x+4) y+2=-\frac{3}{4}(x+4) \newlineNeither\newlineI only\newlineII only\newlineI and II

Full solution

Q. Which of the following equations represents a line that passes through the points (4,8) (4,-8) and (0,5) (0,-5) ?\newlineI. 3x+4y=20 3 x+4 y=-20 \newlineII. y+2=34(x+4) y+2=-\frac{3}{4}(x+4) \newlineNeither\newlineI only\newlineII only\newlineI and II
  1. Find Slope: Find the slope of the line passing through the points (4,8)(4,-8) and (0,5)(0,-5). The slope mm is calculated using the formula m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}. m=5(8)04m = \frac{-5 - (-8)}{0 - 4} m=34m = \frac{3}{-4} m=34m = -\frac{3}{4}
  2. Write Point-Slope Equation: Use the slope and one of the points to write the equation of the line in point-slope form.\newlineLet's use the point (4,8)(4, -8) and the slope 34-\frac{3}{4}.\newlineThe point-slope form is yy1=m(xx1)y - y_1 = m(x - x_1).\newliney(8)=(34)(x4)y - (-8) = (-\frac{3}{4})(x - 4)\newliney+8=(34)(x4)y + 8 = (-\frac{3}{4})(x - 4)
  3. Convert to Slope-Intercept: Convert the point-slope form to slope-intercept form y=mx+by = mx + b to find the y-intercept bb.\newliney+8=(34)(x4)y + 8 = \left(-\frac{3}{4}\right)(x - 4)\newliney=(34)x+3+8y = \left(-\frac{3}{4}\right)x + 3 + 8\newliney=(34)x+11y = \left(-\frac{3}{4}\right)x + 11
  4. Check Equation I: Check if equation I 3x+4y=203x + 4y = -20 is the same line by rearranging it into slope-intercept form.3x+4y=203x + 4y = -204y=3x204y = -3x - 20y=(34)x5y = \left(-\frac{3}{4}\right)x - 5
  5. Check Equation II: Compare the slope and y-intercept of equation I with the line's slope and y-intercept from Step 33.\newlineThe slope of equation I is 34-\frac{3}{4}, which matches the slope we found.\newlineThe y-intercept of equation I is 5-5, which does not match the y-intercept we found (+11+11).\newlineTherefore, equation I does not represent the line passing through the points (4,8)(4,-8) and (0,5)(0,-5).
  6. Check Equation II: Compare the slope and yy-intercept of equation I with the line's slope and yy-intercept from Step 33.\newlineThe slope of equation I is 34-\frac{3}{4}, which matches the slope we found.\newlineThe yy-intercept of equation I is 5-5, which does not match the yy-intercept we found (+11+11).\newlineTherefore, equation I does not represent the line passing through the points (4,8)(4,-8) and (0,5)(0,-5).Check if equation II (y+2=(34)(x+4)y + 2 = -\left(\frac{3}{4}\right)(x + 4)) is the same line by rearranging it into slope-intercept form.\newliney+2=(34)(x+4)y + 2 = -\left(\frac{3}{4}\right)(x + 4)\newlineyy11\newlineyy22
  7. Check Equation II: Compare the slope and y-intercept of equation I with the line's slope and y-intercept from Step 33.\newlineThe slope of equation I is 34-\frac{3}{4}, which matches the slope we found.\newlineThe y-intercept of equation I is 5-5, which does not match the y-intercept we found (+11+11).\newlineTherefore, equation I does not represent the line passing through the points (4,8)(4,-8) and (0,5)(0,-5).Check if equation II (y+2=(34)(x+4)y + 2 = -\left(\frac{3}{4}\right)(x + 4)) is the same line by rearranging it into slope-intercept form.\newliney+2=(34)(x+4)y + 2 = -\left(\frac{3}{4}\right)(x + 4)\newliney=(34)x32y = -\left(\frac{3}{4}\right)x - 3 - 2\newliney=(34)x5y = -\left(\frac{3}{4}\right)x - 5Compare the slope and y-intercept of equation II with the line's slope and y-intercept from Step 33.\newlineThe slope of equation II is 34-\frac{3}{4}, which matches the slope we found.\newlineThe y-intercept of equation II is 5-5, which does not match the y-intercept we found (+11+11).\newlineTherefore, equation II does not represent the line passing through the points (4,8)(4,-8) and (0,5)(0,-5).

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