Find the slope of the line graphed below.
2 answers:
There are two ways you could calculate slope.
The first is using two points on the line. Plug the coordinates into the formula:
y₁ - y₂ / x₁ - x₂
This is the difference in rise divided by the difference in run, or rise/run. Our marked coordinates are (-2, -3) and (0, 1).
y₁ - y₂ / x₁ - x₂
-3 - 1 / -2 - 0
-4 / -2
2
The second method is much faster: Look at the graph; count the amount of units the graph rises and the amount of units the graph runs, then divide the former number by the latter number (see attachment).
4 / 2 = 2
Answer:
Slope = 2
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Answer:
$45.22
Step-by-step explanation:
The number of miles per gallon can be represented by the ratio:
Since we know the unit rate of 26 miles per gallon of gas, we can set up a proportion, or equivalent ratios, to find the number of gallons needed for 420 miles:
, where 'x' is the number of gallons of gas
cross-multiply and divide: 26x = 420 or x ≈ 16.15 gallons
If gas is $2.80 per gallon, take the total number of gallons needed and multiply by $2.80:
16.15 x $2.80 = $45.22