Answers

  • Brainly User
2015-09-08T19:21:10+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
A.  It represents a function because of one to one relationship. The values in iput are the x-values, the domain.  The values is out are the y-values, the range which values are depended on x.
x:   -2, 1, 4, 7, 10, 13
y:  15, 13, 11, 9, 7, 5

b.  You can use the slope-point formula:
  y-y1 = y2-y1 (x-x1)
            x2-x1

Let's take the 2 pairs of point (x,y)
(-2, 15)  (1,13)
x1 = -2    x2 = 1   y1 = 15    y2 = 13

y - 15 = 13 - 15 (x - -2)
             1 - - 2

y - 15 = -2 (x + 2)
           1+3
y-15 = -2/3 (x + 2)
y - 15 = -2x/3 - 4/3

y = - 2x/3 - 4/3 + 15
y = -2x/3 - 4/3 + 45/3

y = -2x/3 + 41/3   

The function is linear:
f(x) = -2x/3 + 41/3

3.  Using the the equation for input = -7
f (-7) = -2(-7) + 41/3
            3
f(-7) = 14/3 + 41/3

f(-7) =  54/3
f(-7) = 18

input: -7,  output = 18

4.  output = -25, input = ?
 -25 = -2/3x + 41/3
2/3x = 41/3 + 25
2/3 x = 41/3 + 75/3
2/3x = 116/3

(3/2) (2/3)x = (116/3) (3/2)

x = 58

Input= 58, output = -25

0
Thank you very much po! Napakalaking tulong po nito. Thank you thank you po!! :D
you're welcome :-)