Question

If slope of a line is 4 and x-intercept made by the line is 2 then the equation of line will be __________

(a) y = 4x-8

(b) y = 4x+8

(c) y = 2x+4

(d) y = 2x-4

This question was posed to me in class test.

My doubt stems from General Equation of a Line topic in chapter Straight Lines of Mathematics – Class 11

Answer 1

The correct option is (a) y = 4x-8

The best explanation: Let general equation of line be y=m*x + c.

Given m=4 and value of x when y=0 is 2.

C= – m*2 = -4*2 = -8.

=>y=4x-8.