Math Problem Statement

Solve

Which statement is true about the y-intercepts of Function A and Function B?

Solution

Let's solve the problem step by step.

We are tasked with determining the true statement about the y-intercepts of Function A and Function B.

Function A (from the graph):

To find the y-intercept of Function A, we look at the graph where the line crosses the y-axis.

  • From the graph, we see that the line crosses the y-axis at y = -4. So, the y-intercept of Function A is -4.

Function B (from the table):

For Function B, we can calculate the equation of the line using the points given in the table and then find the y-intercept. We can use the slope-intercept form of a line, y=mx+by = mx + b, where mm is the slope and bb is the y-intercept.

First, we calculate the slope mm: m=y2y1x2x1=5(11)3(6)=5+113+6=63=2m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{-5 - (-11)}{-3 - (-6)} = \frac{-5 + 11}{-3 + 6} = \frac{6}{3} = 2 So, the slope m=2m = 2.

Now, use the slope-intercept form y=mx+by = mx + b to find the y-intercept bb. We can plug in one of the points from the table, say (-6, -11): 11=2(6)+b-11 = 2(-6) + b 11=12+b-11 = -12 + b b=11+12=1b = -11 + 12 = 1 Thus, the y-intercept of Function B is 1.

Comparing y-intercepts:

  • The y-intercept of Function A is -4.
  • The y-intercept of Function B is 1.

Therefore, the y-intercept of Function A is less than the y-intercept of Function B.

The correct statement is:

  • "The y-intercept of Function A is less than the y-intercept of Function B."

Would you like more details or explanations?

Here are 5 related questions to expand on this topic:

  1. How do you find the slope of a line using two points?
  2. What is the significance of the y-intercept in a linear function?
  3. How can we use the slope and y-intercept to graph a linear equation?
  4. How do you determine if two lines are parallel or perpendicular?
  5. How do you interpret the slope in real-world scenarios?

Tip: Remember, the y-intercept is the point where the line crosses the y-axis, and it occurs when x=0x = 0.

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Math Problem Analysis

Mathematical Concepts

Linear Functions
Slope-Intercept Form
Y-Intercept

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)
Slope-intercept form: y = mx + b

Theorems

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Suitable Grade Level

Grades 7-9