Answer:
Non-proportional
y = [tex]\frac{2}{15}x+20[/tex]
Step-by-step explanation:
If a line doesn't pass through the origin relationship represented by the line is non proportional.
In other words, any line having y-intercept is non-proportional.
From the graph attached,
Line has a y-intercept = 20
Therefore, relationship is non-proportional.
Slope of a line passing through two points [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex],
m = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
Since, the given line is passing through (0, 20) and (60, 28),
Slope of the line 'm' = [tex]\frac{28-20}{60-0}[/tex]
m = [tex]\frac{8}{60}[/tex]
= [tex]\frac{2}{15}[/tex]
y-intercept 'b' = 20
Slope-intercept form of the equation is,
y = mx + b
So the equation will be,
y = [tex]\frac{2}{15}x+20[/tex]
