Solved on Jan 19, 2024

Find the remaining distance for a linear function with slope -0.95 miles/minute, given 64 miles remaining after 37 minutes of driving. Determine the remaining distance after 57 minutes of driving.

STEP 1

Assumptions
1. The remaining distance to drive is a linear function of Milan's driving time.
2. The slope of the line representing this function is 0.95-0.95.
3. Milan has 6464 miles remaining after 3737 minutes of driving.
4. We want to find the remaining distance after 5757 minutes of driving.

STEP 2

The general form of a linear function is:
y=mx+b y = mx + b
where yy represents the remaining distance, mm is the slope, xx is the driving time, and bb is the y-intercept.

STEP 3

We know the slope mm of the line is 0.95-0.95, so we can write the function as:
y=0.95x+b y = -0.95x + b

STEP 4

We need to find the y-intercept bb. To do this, we can use the point (37,64)(37, 64), where 3737 is the driving time in minutes and 6464 is the remaining distance in miles.

STEP 5

Substitute x=37x = 37 and y=64y = 64 into the equation to find bb:
64=0.9537+b 64 = -0.95 \cdot 37 + b

STEP 6

Calculate the product of 0.95-0.95 and 3737:
0.9537=35.15 -0.95 \cdot 37 = -35.15

STEP 7

Add 35.1535.15 to both sides of the equation to isolate bb:
64+35.15=b 64 + 35.15 = b

STEP 8

Calculate the value of bb:
b=64+35.15=99.15 b = 64 + 35.15 = 99.15

STEP 9

Now we can write the complete linear function for the remaining distance yy as a function of driving time xx:
y=0.95x+99.15 y = -0.95x + 99.15

STEP 10

To find the remaining distance after 5757 minutes of driving, substitute x=57x = 57 into the equation:
y=0.9557+99.15 y = -0.95 \cdot 57 + 99.15

STEP 11

Calculate the product of 0.95-0.95 and 5757:
0.9557=54.15 -0.95 \cdot 57 = -54.15

STEP 12

Add 99.1599.15 to 54.15-54.15 to find the remaining distance yy:
y=54.15+99.15 y = -54.15 + 99.15

STEP 13

Calculate the value of yy:
y=99.1554.15=45 y = 99.15 - 54.15 = 45
Milan will have 4545 miles remaining after 5757 minutes of driving.

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