What is th graph of x plus 7 3?

Answer 1

I will assume you are not involved with Calculus yet, which means you don't have to proof it's linear.

Let y = f(x) = x + 73

domain: R for all real

range: Since all real numbers can be writer as something+73, so R for real

First it's linear, as in it's a straight line, which is the same as saying x is degree 1.

Second it's y - intercept is 73 (f(0) = 0 + 73 = 73)

It's x - intercept is - 73 ( if f(x) = 0, x + 73 = 0 => x = -73)

You have two points, you can draw one and only one line. That's your function.