Question

Find the value of r so that the slope between the points is 4. (6, -2) and (r, -6)
a. -5
b. 5
c. -42
d. 4
The slope of the line passing through (5, -4) and (5, -10) is ___
a. positive
b. negative
c. zero
d. undefined
If a 3 month old baby is 20 inches tall, and then at 7 months old, the baby is 26 inches tall, what is the average growth of the baby each month?
a. 1.5 in. per month
b. 2/3 in. per month
c. 6 in. per month
d. 6/7 in. per month

Answer 1

1. the slope formula is\[\frac{ y_1-y_2 }{ x_1-x_2 }\]
so plug in the known numbers.
\[\frac{ -2-(-6) }{ 6-r }\]
6 minus what equals 1? Since the numerator is 4 to make the slope 4 the denominator needs to be 1.

Answer 2

2. just use the slope formula I just showed you and you can determine if the slop is positive, negative, zero, or undefined.

3. The month is the x value and the age is the y value. So use the formula.
\[\frac{ 20-26 }{ 3-7 }\] It'll be a fraction so just punch it into your calculator and you'll get the decimal equivalent.

Answer 3

Hey can I get a medal? Or was I not helpful?