Question

What is the y-intercept for f(x)=x2-8x+15

Answer 1

(0, 15)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Algebra I

• Function Notation
• The y-intercept is the y value when x = 0. Another way to reword that is when the graph crosses the y-axis.

Explanation:

Step 1: Define

f(x) = x² - 8x + 15

Step 2: Find y-intercept

1. Substitute x = 0: f(0) = 0² - 8(0) + 15
2. Exponents: f(0) = 0 - 8(0) + 15
3. Multiply: f(0) = 0 + 15
4. Add: f(0) = 15
5. Rewrite: (0, 15)