Math Problem Statement

whats the x-intercept, y-intercept, and slope of y = 4x + 3

Solution

To determine the x-intercept, y-intercept, and slope of the line y=4x+3y = 4x + 3:

1. Slope:

The slope of a line is the coefficient of xx in the slope-intercept form y=mx+by = mx + b, where mm is the slope.
Here, m=4m = 4.
Slope = 4


2. Y-Intercept:

The yy-intercept is the value of yy when x=0x = 0.
Substitute x=0x = 0 into y=4x+3y = 4x + 3:
y=4(0)+3=3y = 4(0) + 3 = 3
Y-Intercept = (0, 3)


3. X-Intercept:

The xx-intercept is the value of xx when y=0y = 0.
Set y=0y = 0 in y=4x+3y = 4x + 3:
0=4x+30 = 4x + 3
Solve for xx:
4x=3    x=344x = -3 \quad \implies \quad x = -\frac{3}{4}
X-Intercept = 34,0-\frac{3}{4}, 0


Summary:

  • Slope: 44
  • Y-Intercept: (0,3)(0, 3)
  • X-Intercept: (34,0)\left( -\frac{3}{4}, 0 \right)

Would you like a graph or further explanation? 😊

Here are 5 related questions to deepen understanding:

  1. How do you find the slope of a line from two points?
  2. What is the equation of a line parallel to y=4x+3y = 4x + 3?
  3. How do you find the equation of a line given its slope and a point?
  4. What changes if the slope in y=mx+by = mx + b is negative?
  5. Can a line have no x-intercept or y-intercept? Why?

Tip: To verify intercepts, always substitute the relevant variable (either x=0x = 0 or y=0y = 0) into the equation.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Intercepts
Slope-Intercept Form

Formulas

Slope-Intercept Form: y = mx + b
Finding the x-intercept: Set y = 0 in the equation
Finding the y-intercept: Set x = 0 in the equation

Theorems

Properties of Linear Equations

Suitable Grade Level

Grades 7-9