CPM Homework Help : CCA2 Problem 1-89

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1-89.

What value of $y$ allows you to find the $x$ -intercept? For each of the equations below, find where its graph intersects the $x$ -axis. Write each answer as an ordered pair.

Answer:

$y = 0$ allows you to find the $x$ -intercept.

$y = 3 x + 6$
Hint (a):
$(0) = 3x + 6$
Answer (a):
$(−2, 0)$

$x = 5 y - 10$
Answer (b):
$(−10, 0)$

$y = x ^ { 2 }$

$y = 2 x ^ { 2 } - 4$
Answer (d):
$\left(\pm\sqrt{2}, 0\right)$

$y = ( x - 5 ) ^ { 2 }$
Hint (e):
Let $y = 0$ .
More Help 1(e):
Take the square root of both sides of the equation.
More Help 2(e):
Add $5$ to both sides of the equation.
Answer (e):
$(5, 0)$

$y = x ^ { 3 } - 13$
Answer (f):
$\left(^3\sqrt{13}, 0\right)$