How to find the y-intercept from the equation

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

How are sas and sss used to show that two triangles are congruent?