Question

Bill started walking to town at a speed of 6km/hr. Thirty minutes later Sue wanted to catch up to Bill and started running at 12 km/hr. Draw a graph to show how long it would take for Sue to catch up to Bill.

can someone help me graph this

Answer 1

make the x-axis time. Make each step 10 minutes
make the y-axis distance. Make each step 1 km

For Bill, plot a line that has a slope of 6 km/1 hour = 6 steps up/ 6 steps over
that goes through the point (0,0)
can you do that ?

Answer 2

yes i did. now what?

Answer 3

Thirty minutes later Sue ... that means Sue starts 3 steps over from 0,0 at the point 3,0
(10 minutes per step times 3 steps= 30 minutes)


Her slope is 12 km/hr = 12 steps up /6 steps over
plot a line with that slope that goes through (3,0)

Answer 4

but the graph is small 12 doesn't show

Answer 5

do i have to make the distance larger?

Answer 6

there is only 10 steps

Answer 7

if you don't have enough squares, you have to change what a step "means"

make the 1 step up mean 2 km
that means for Bill, his slope is 6 km/60 min = 3 steps up / 6 steps over
and Sue's slope is 12 km/60 min = 6 steps up/6 steps over

Answer 8

and for the x axis each square is 10 min?

Answer 9

yes, try it. if the lines don't cross on the graph you might have to change to a bigger step