Find the Linear Function Through (-3,-5) with 45-Degree Angle

Which function represents a straight line that passes through the point (3,5) (-3,-5) and creates an angle of 45 degrees with the positive part of the x axis?

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find the algebraic representation of the function
00:03 We'll use the formula to calculate slope according to the angle with X-axis
00:07 We'll substitute the angle according to the given data and calculate to find the slope
00:17 This is the line's slope
00:22 Now we'll use the line equation
00:26 We'll substitute the point according to the given data
00:31 We'll substitute the slope and solve to find the intersection point (B)
00:49 We'll isolate the intersection point (B)
00:53 This is the intersection point with Y-axis
00:58 Now we'll substitute the intersection point and slope in the line equation
01:09 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Which function represents a straight line that passes through the point (3,5) (-3,-5) and creates an angle of 45 degrees with the positive part of the x axis?

2

Step-by-step solution

To solve this problem, let's start by finding the slope mm of the line. Since the line makes a 45-degree angle with the positive xx-axis, the slope m=tan(45)=1m = \tan(45^\circ) = 1.

Next, we will use the point-slope form of the line equation, which is given by:

yy1=m(xx1) y - y_1 = m(x - x_1)

where (x1,y1)=(3,5)(x_1, y_1) = (-3, -5) and m=1m = 1. Substituting these values, we have:

y+5=1(x+3) y + 5 = 1 \cdot (x + 3)

which simplifies to:

y+5=x+3 y + 5 = x + 3

Subtract 5 from both sides to put it into slope-intercept form y=mx+by = mx + b, we get:

y=x2 y = x - 2

Therefore, the function that represents the line through (3,5)(-3, -5) with a 45-degree angle with the xx-axis is y=x2 y = x - 2 .

3

Final Answer

y=x2 y=x-2

Practice Quiz

Test your knowledge with interactive questions

Look at the function shown in the figure.

When is the function positive?

xy-4-7

🌟 Unlock Your Math Potential

Get unlimited access to all 18 Linear Functions questions, detailed video solutions, and personalized progress tracking.

📹

Unlimited Video Solutions

Step-by-step explanations for every problem

📊

Progress Analytics

Track your mastery across all topics

🚫

Ad-Free Learning

Focus on math without distractions

No credit card required • Cancel anytime

More Questions

Click on any question to see the complete solution with step-by-step explanations