Graph each equation using slope and y-intercept



Name _____________________________

Class example: Two cars are traveling along a highway in the same direction. They take x hours to travel y miles from point A on the highway. Their motions are described by the equations

y = 60x

y = 50x + 20

Graph the lines below.

For you to try:

p. 222 Guided Practice #4

Oven 1: T = t + 200

Oven 2: T = 2t + 80

time t (seconds)

Now do p. 224 #13

Cyclist 1: d = 10t

Cyclist 2: d – 8t = 2

time x (hours)

When will the cars meet? ______

How many miles will they

have driven when they meet? ______

When will the temperatures

of the ovens be the same? _______

How many minutes is that? _______

What will the

temperature be? _______

time t (hours)

When did they meet? ________

How far away from

point A did they meet? ________

Review: Remember to solve for y first!

1. y – x = 3 x + y = -1 2. 2x + y = 7 y – 3x = -3 3. x + y = 6 2x + y = 8

Solution: (_____, _____) Solution: (_____, _____) Solution: (_____, _____)

Check: Check: Check:

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