Question

How do you graph `y = 5x - 2`?

Answer 1

Find two points. Plot them on a graph sheet. Join them with the help of a straight line.

Explanation:

It is a linear function. You will get a straight line.

given -
y = 5x - 2

At x = 0; y = 5(0) - 2 = - 2

(0, -2) is one point. It is Y intercept.

At Y = 0 ; 5x - 2 = 0 ; x = `2/5`

(`2/5`, 0) is another point on the line.

Since it is a fraction , use your imagination to get two integers as co-ordinates.

At y = 8 ; 5x -2 = 8; 5x = 8 + 2 = 10 ; x = `(10/5)` = 2

(2, 8 ) is another point on the line.

Plot points (-2, 0) and (2, 8 ).
graph{5x - 2 [-10, 10, -5, 5]}