Questions: Match each linear equation with its graph
Equation
Graph Color
y=5x-3
a. blue (B)
y=-3x-2
b. purple (P)
y=-5x-3
c. green (G)
y=-4
d. black (K)
y=1/4x-2
e. red (R)
Transcript text: Match each linear equation with its graph
Equation
Graph Color
$y=5 x-3$
a. blue (B)
$y=-3 x-2$
b. purple (P)
$y=-5 x-3$
c. green $(\mathrm{G})$
$y=-4$
d. black (K)
$y=\frac{1}{4} x-2$
e. red (R)
Solution
Solution Steps
Step 1: Identify the y-intercepts
Equation 1: \( y = 5x - 3 \) has a y-intercept of -3.
Equation 2: \( y = -3x - 2 \) has a y-intercept of -2.
Equation 3: \( y = -5x - 3 \) has a y-intercept of -3.
Equation 4: \( y = -4 \) is a horizontal line with a y-intercept of -4.
Equation 5: \( y = \frac{1}{4}x - 2 \) has a y-intercept of -2.
Step 2: Match y-intercepts with graphs
The purple line (P) intersects the y-axis at -4, so it corresponds to \( y = -4 \).
The red line (R) intersects the y-axis at -2, so it corresponds to either \( y = -3x - 2 \) or \( y = \frac{1}{4}x - 2 \).
The blue (B) and green (G) lines intersect the y-axis at -3, so they correspond to either \( y = 5x - 3 \) or \( y = -5x - 3 \).
Step 3: Determine the slopes
The red line (R) has a positive slope, so it corresponds to \( y = \frac{1}{4}x - 2 \).
The black line (K) has a negative slope and intersects the y-axis at -2, so it corresponds to \( y = -3x - 2 \).
The blue line (B) has a positive slope, so it corresponds to \( y = 5x - 3 \).
The green line (G) has a negative slope, so it corresponds to \( y = -5x - 3 \).