Equations of straight lines - Jamb Mathematics Past Questions and Answers

Question 16:

• JAMB 1997

The angle between the positive horizontal axis and a given line is 135^o. Find the equation of the line if it passes through the point (2,3)

A. X - y = 1
B. X + y = 1
C. X + y = 5
D. X - y = 5

Question 17:

• JAMB 1998

find the equation of the curve which passes through by 6x - 5

A. 6x² - 5x + 5
B. 6x² + 5x + 5
C. 3x² - 5x - 5
D. 3x² - 5x + 3

Question 18:

• JAMB 2000

3y = 4x - 1 and Ky = x + 3 are equations of two straight lines. If the two lines are perpendicular to each other, find K.

A. -4/3
B. -3/4
C. 3/4
D. 4/3

Question 19:

• JAMB 2001

A straight line makes an angle of 30° with the positive x-axis and cuts the y-axis at y = 5. Find the equation of the straight line.

A. Y = (x/10) + 5
B. Y = x + 5
C. √3y = - x + 5√3
D. √3y = x + 5√3

Question 20:

• JAMB 2003

The graph of the function y = x\(^2\) + 4 and a straight line PQ are drawn to solve the equation x\(^2\) - 3x + 2 = 0. What is the equation of PQ?

A. Y = 3x - 2
B. Y = 3x + 2
C. Y = 3x - 4
D. Y = 3x + 4