Example
Paolo is going to take part in a 20-kilometer walk.
He makes this graph to show the relationship
between time and remaining distance if he
maintains his planned speed. Write an equation
for this function.
Make a table to
xo123 45
find the slope and
y 2016 12 8 40
the y-intercept.
Distance
Remaining (km)
0
1
2 3 4 5
Time (hr)
The table shows that when x = 0, y = 20, so the y-intercept is
20. As each x-coordinate increases by 1, each y-coordinate
decreases by 4, so the slope is 4, or-4.
The equation is y = - 4x + 20.

1 What do the y-intercept and the slope mean in the
context of the example problem?

is this part of a question or something

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²