Question 916111
x=10,15,20,25  y=337,340,343,346

these are ordered pairs:

(10,337),(15,340),(20,343),(25,346)

use two points to find a slope and equation {{{y=ax+b}}} of a line:

Slope a is {{{a=(y-y[1])/(x-x[1])}}}

{{{a=(337-340)/(10-15)}}}

{{{a=(-3)/(-5)}}}

{{{a=0.6}}}

find {{{b}}}

{{{337=0.6*10+b}}} 

{{{337=6+b}}} 

{{{337-6=b}}}

{{{331=b}}}


so, equation will be:  {{{y=0.6x+331}}} 

 {{{drawing( 600, 600, -500, 500, -100, 500,locate(25.8,347,p(25,346)),locate(20,343,p(20,343)),circle(20,343,1.2),  circle(25,346,1.2),  graph( 600, 600, -500, 500, -100, 500, 0.6x+331)) }}}