What is the y-intercept of the graph below?

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.