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smelcher3900
28.10.2020 •
Mathematics
Which equation describes the line through the points (4,-3) and (5,0)
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Ответ:
y = 3x - 15
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m =![\frac{y_{2}-y_{1} }{x_{2}-x_{1} }](/tpl/images/0847/6088/287b9.png)
with (x₁, y₁ ) = (4, - 3) and (x₂, y₂ ) = (5, 0)
m =
= 3 , thus
y = 3x + c ← is the partial equation
To find c substitute either of the 2 points into the partial equation
Using (5, 0 ), then
0 = 15 + c ⇒ c = 0 - 15 = - 15
y = 3x - 15 ← equation of line
Ответ:
Maura runs faster.
Step-by-step explanation:
Step 1 ) Convert 1.25 hours to minutes = 75 min; this is important!
Step 2) 75 divided by 5; will tell you how much time it took Maura to run per mile. It took Maura 15 minutes to run per mile.
Step 3) 50 divide by 3; will tell you how much time it took Ava to run per mile.
It took Ava 16.6 minutes to run per mile.
In conclusion Maura runs faster.
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