Find the intercepts, and then use them to graph the equation. \( y-5 x=0 \)

Exercises 35-42: Write the given expression in the form \( f(x)=a(x-1)^{2}+k \). Ifentify the vertex: \( \begin{array}{ll}\text { 35. } f(x)=x^{2}-3 x & \text { 36. } f(x)=x^{2}-7 x+5 \\ \text { 37. } f(x)=2 x^{2}-5 x+3 & \text { 38. } f(x)=3 x^{2}+6 x+2 \\ \text { 39. } f(x)=2 x^{2}-8 x-1 & \text { 40. } f(x)=-\frac{1}{2} x^{2}-x \\ \text { 41. } f(x)=2-6 x-3 x^{2}\end{array} \) 42. \( f(x)=6+5 x-10 x^{2} \)

Give the \( y \)-interecept \[ 3 x+y=5 \]

Simplify. Assume that variable \( z \) is nonzero. \( y^{5} z^{-9} \)

(1) 270 Sarah is bringing treats to her elementary school class on her birthday. The number of treats she brings in is based on the number of students in her class. \( \mathrm{t}= \) the number of treats \( \mathrm{s}= \) the number of students Which of the variables is independent?

Solve for x: \( 3^{x} = 81 \).