Question

let f be a function by f(x)= -5x-3, D is its graph. Determine the coordinates of the point of intersections of D with the x-axis and the y-axis

Answer 1

Indirectly we are asked for x and y intercepts because

• The point at which a line crosses x axis is called its x intercept and there y coordinate is 0.
• Similarly the point at which a line crosses y axis is called its y intercept and there x coordinate is 0

Let us find out

• f(x)=-5x-3

Y intercept:-

put x=0

• y=-5(0)-3
• y=-3

(0,-3)

X intercept

put y=0

• -5x-3=0
• -5x=3
• x=-3/5

(-3/5,0)