Question 631766
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Hi,
is f(x)=x+5 a linear function? 
Yes, graph of this function is a LINE.  
Slope-Intercept Form:  f(x) = mx + b,  Slope m = 1 and y-intercept is Pt(0,5)
{{{drawing(300,300,   -6, 6, -6, 6,grid(1),
circle(-5, 0,0.3),
circle(0, 5,0.3),
graph( 300, 300, -6, 6, -6, 6,0, x+5))}}}