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using: y=5x -4

a. calculate the x intercept

b. graph using the x and y intercept method

Tiffybean  Oct 29, 2017

Best Answer 

 #1
avatar+7096 
+1

y  =  5x - 4

 

a.  The x-intercept is the value of  x  when  y = 0 , so plug in  0  for  y  and solve for  x .

 

0  =  5x - 4      Add  4  to both sides of the equation.

4  =  5x           Divide both sides by  5 .

4/5  =  x

 

The x-intercept is  4/5  , or the point  (4/5, 0)  .

 

b.  Now we need to find the y-intercept. So plug in  0  for  x  and solve for  y .

 

y  =  5(0) - 4

y  =  -4

 

The y-intercept is  -4  , which is the point  (0, -4) .

 

To graph this, plot the points  (4/5, 0)  and  (0, -4)  and draw a line through them.

It should look like this.

hectictar  Oct 29, 2017
 #1
avatar+7096 
+1
Best Answer

y  =  5x - 4

 

a.  The x-intercept is the value of  x  when  y = 0 , so plug in  0  for  y  and solve for  x .

 

0  =  5x - 4      Add  4  to both sides of the equation.

4  =  5x           Divide both sides by  5 .

4/5  =  x

 

The x-intercept is  4/5  , or the point  (4/5, 0)  .

 

b.  Now we need to find the y-intercept. So plug in  0  for  x  and solve for  y .

 

y  =  5(0) - 4

y  =  -4

 

The y-intercept is  -4  , which is the point  (0, -4) .

 

To graph this, plot the points  (4/5, 0)  and  (0, -4)  and draw a line through them.

It should look like this.

hectictar  Oct 29, 2017

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