Question

How do you graph $ y = - 5x + 10 $ using intercepts?

Answer 1

Hint: We have to graph the given equation by using the intercepts. The x-intercept is that point on the x-axis at which the given equation cuts the x-axis, so at x-intercept y is 0. The y-intercept is that point on the y-axis at which the given line cuts the y-axis, so at y-intercept x is 0. So we put the value of both x and y zero one by one and then find the value of other variables from the equation of the line. We can obtain the line on the graph by joining these points.

Complete step-by-step answer:
The equation of the line is $ y = - 5x + 10 $
When $ x = 0 $
 $
  y = - 5(0) + 10 \\
   \Rightarrow y = 10 \;
  $
The line cuts the y-axis at the point $ (0,10) $
When $ y = 0 $
 $
  0 = - 5x + 10 \\
   \Rightarrow 5x = 10 \\
   \Rightarrow x = 2 \;
  $
The line cuts the x-axis at the point $ (2,0) $
We can trace the line of the equation $ y = - 5x + 10 $ by joining these two points and then extending the obtained line away in the opposite directions.

Note: A graph shows the relation between two variable quantities, it contains two axes perpendicular to each other namely the x-axis and the y-axis. Each variable is measured along one of the axes. In the question, we are given one linear equation containing two variables namely x and y, x is measured along the x-axis and y is measured along the y-axis while tracing the given equations. To find the equation of a line, we must know the coordinates of at least two of the points lying on the line. We are given the equation of a line in the question so we had to find the coordinates using the given equation.