Question

x: number of minutes
y: height above ground
find rumi and noams height after 5 minutes.
rumi: feet noam: ? feet
46
48
50
52
54
(chart: noam: y = 8x + 10; rumi: y = 10x. x-axis: number of minutes, y-axis: height above ground)

Explanation:

Step1: Substitute x=5 for Rumi

$y = 10 \times 5$

Step2: Calculate Rumi's height

$y = 50$

Step3: Substitute x=5 for Noam

$y = 8 \times 5 + 10$

Step4: Calculate Noam's height

$y = 40 + 10 = 50$

Answer:

Rumi: 50 feet
Noam: 50 feet