Question

Help please!
Assume a 115 pound person burns 36 calories after 12 minutes of walking and 54 calories after 18 minutes of walking.
Part 1 : Use calories as the y-coordinate and minutes as the x-coordinate. After writing two ordered pairs, find the slope. What does the slope represent in terms of the information provided?

Part 2 : Write an equation, in slope intercept form, to represent this data.

Part 3 : How many calories will this person burn after 35 minutes of walking? Using complete sentences, explain how the equation, slope, or graph can help to predict calories burned.

Answer 1

y = 3x

Answer 2

for the first one?

Answer 3

to find the gradient m = (54 - 36)/(18-12) m = 3

then to find the y intercept y = 3x + b use 12 and 36 36 = 3 x 12 + b

b = 0

hence y = 3x

Answer 4

ordered pairs (12,36) and (18, 54)

Answer 5

the slope represents the number of calories burnt per minute

Answer 6

part 3 sub x = 35 to find y...

Answer 7

Thanks you guys :)