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# using: y=5x -4

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using: y=5x -4

a. calculate the x intercept

b. graph using the x and y intercept method

Oct 29, 2017

#1
+7354
+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.

Oct 29, 2017

#1
+7354
+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