Q3.
[tex](0;\ 7);\ (5;\ 3).\\The\ slope:m=\dfrac{3-7}{5-0}=\dfrac{-4}{5}[/tex]
Answer: [tex]y=-\dfrac{4}{5}x+7[/tex]
Q4.
The horizontal line: y = a
Answer: y = 4
Q5.
x-intecept of Ax + By = C is that value of x for which y = 0
2x + 4y = -10
/subtitute y=0/
2x + 4 · 0 = -10
2x = -10 |divide both sides by 2
x = -5
Answer: (-5; 0)
Q6.
x = a is the vertical line
x = 5
Answer: Graph #4.
Q7.
6x - 4y = -8 |subtract 6x from both sides
-4y = -6x - 8 |divide both sides by (-4)
y = 1.5x + 2
y-intercept (0; 2)
1.5x + 2 = 0 |subtract 2 from both sides
1.5x = -2 |divide both sides by 1.5
x = -1 1/3
x-intercept (-1 1/3; 0)
Answer: Graph #3.
