+0  
 
0
123
2
avatar+165 

One linear function, t(x), can be modeled by the values in the table below. A second linear function can be modeled by the equation 4x − y + 4 = 0. When comparing the x-intercepts of these lines, which function has the largest x-intercept and what is this value?

 

  x        t(x)

−3         0

  0       −4

  3       −8

  6      −12

  9      −16

 

A   t(x) has the largest x-intercept: −4.

B   4x − y + 4 = 0 has the largest x-intercept: −1.

C   t(x) has the largest x-intercept: −3.

D   4x − y + 4 = 0 has the largest x-intercept: 4.

hay24  Apr 22, 2018
 #1
avatar+91046 
+1

4x - y + 4  = 0

 

The x intercept  wil occur when y  = 0.....so....

 

4x - 0 + 4  = 0

 

4x  + 4  =   0       subtract 4 from both sides

 

4x  =  - 4           divide both sides by 4

 

x  = - 1

 

The x intercept for f(x)  is  at x = -3

 

So..... 4x - y + 4  = 0    has the larger x intercept at  x  = -1   ⇒   B

 

 

cool cool cool

CPhill  Apr 22, 2018
 #2
avatar+165 
+1

thankyou so much! That makes so much sense now!

hay24  Apr 22, 2018

20 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.