Math Problem Statement

Find the y-intercept of the line y= – 10x+ 1 9 . Write your answer as an integer or as a simplified proper or improper fraction, not as an ordered pair.

Solution

The equation of the line is given as:

y=10x+19y = -10x + \frac{1}{9}

The y-intercept is the value of yy when x=0x = 0. Substituting x=0x = 0 into the equation:

y=10(0)+19=19y = -10(0) + \frac{1}{9} = \frac{1}{9}

Thus, the y-intercept is:

19\frac{1}{9}

Would you like more details on how y-intercepts are determined?


Here are 5 related questions for further practice:

  1. Find the y-intercept of y=5x7y = 5x - 7.
  2. What is the slope of the line y=10x+19y = -10x + \frac{1}{9}?
  3. Write the equation of a line with a slope of -3 and a y-intercept of 4.
  4. Find the x-intercept of y=10x+19y = -10x + \frac{1}{9}.
  5. Determine if the line y=10x+19y = -10x + \frac{1}{9} is increasing or decreasing.

Tip: The y-intercept is always where the line crosses the y-axis, which occurs when x=0x = 0.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations

Formulas

y = mx + b (Slope-Intercept Form)

Theorems

Y-intercept occurs where x = 0

Suitable Grade Level

Grades 8-10